diff --git a/src/views/iot/runoverview/components/OperationTimelineChart.vue b/src/views/iot/runoverview/components/OperationTimelineChart.vue
index 670b1f12..bcf476b6 100644
--- a/src/views/iot/runoverview/components/OperationTimelineChart.vue
+++ b/src/views/iot/runoverview/components/OperationTimelineChart.vue
@@ -31,9 +31,17 @@
           <div class="timeline-table__device">{{ t('DataCollection.RunOverview.tableDeviceNameColumn') }}</div>
           <div class="timeline-table__rate">{{ t('DataCollection.RunOverview.tableUtilizationRateColumn') }}</div>
         </div>
-        <div class="timeline-scale">
-          <div v-for="hour in hourTicks" :key="hour" class="timeline-scale__tick">
-            {{ hour }}
+        <div class="timeline-chart" :style="timelineChartStyle">
+          <div class="timeline-scale">
+            <div
+              v-for="tick in hourTicks"
+              :key="tick.key"
+              class="timeline-scale__tick"
+              :class="`is-${tick.align}`"
+              :style="{ left: `${tick.position}%` }"
+            >
+              {{ tick.label }} :00
+            </div>
           </div>
         </div>
       </div>
@@ -43,18 +51,25 @@
           <div class="timeline-table__device">{{ row.name }}</div>
           <div class="timeline-table__rate">{{ row.utilizationRate.toFixed(2) }}%</div>
         </div>
-        <div class="timeline-track">
-          <div v-for="hour in 24" :key="hour" class="timeline-track__hour"></div>
-          <div
-            v-for="(segment, index) in row.segments"
-            :key="`${row.id}-${index}`"
-            class="timeline-segment"
-            :style="{
-              left: `${(segment.startHour / 24) * 100}%`,
-              width: `${((segment.endHour - segment.startHour) / 24) * 100}%`,
-              background: statusColors[segment.status]
-            }"
-          ></div>
+        <div class="timeline-chart" :style="timelineChartStyle">
+          <div class="timeline-track">
+            <div
+              v-for="tick in hourTicks"
+              :key="tick.key"
+              class="timeline-track__hour"
+              :style="{ left: `${tick.position}%` }"
+            ></div>
+            <div
+              v-for="(segment, index) in row.segments"
+              :key="`${row.id}-${index}`"
+              class="timeline-segment"
+              :style="{
+                left: `${(segment.startHour / 24) * 100}%`,
+                width: `${((segment.endHour - segment.startHour) / 24) * 100}%`,
+                background: statusColors[segment.status]
+              }"
+            ></div>
+          </div>
         </div>
       </div>
     </div>
@@ -84,6 +99,7 @@
 
 <script setup lang="ts">
 import { computed } from 'vue'
+import dayjs from 'dayjs'
 import type { DeviceTimelineRow, RunStatus } from './types'
 
 const props = defineProps<{
@@ -116,7 +132,40 @@ const legendItems = computed(() => [
   { status: 'offline' as const, color: statusColors.offline, label: t('DataCollection.RunOverview.legend.offline') }
 ])
 
-const hourTicks = Array.from({ length: 24 }, (_, index) => `${String(index).padStart(2, '0')}:00`)
+const timelineRange = computed(() => {
+  const start = dayjs(props.statisticsStart)
+  const end = dayjs(props.statisticsEnd)
+  if (start.isValid() && end.isValid() && end.isAfter(start)) return { start, end }
+
+  const fallbackStart = dayjs().startOf('day')
+  return { start: fallbackStart, end: fallbackStart.add(1, 'day') }
+})
+
+const rangeHours = computed(() => Math.max(timelineRange.value.end.diff(timelineRange.value.start, 'hour', true), 1))
+
+const hourTicks = computed(() => {
+  const { start, end } = timelineRange.value
+  const ticks: Array<{ key: string; label: string; position: number; align: 'start' | 'center' | 'end' }> = []
+  const totalSeconds = end.diff(start, 'second', true)
+  let current = start.startOf('hour')
+  if (current.isBefore(start)) current = current.add(1, 'hour')
+
+  while (!current.isAfter(end)) {
+    const position = (current.diff(start, 'second', true) / totalSeconds) * 100
+    ticks.push({
+      key: current.valueOf().toString(),
+      label: current.format('HH'),
+      position,
+      align: position === 0 ? 'start' : position === 100 ? 'end' : 'center'
+    })
+    current = current.add(1, 'hour')
+  }
+  return ticks
+})
+
+const timelineChartStyle = computed(() => ({
+  minWidth: `${Math.max(720, Math.ceil(rangeHours.value) * 64)}px`
+}))
 
 const timelineRows = computed(() =>
   props.rows.map((row) => ({
@@ -219,30 +268,34 @@ const timelineRows = computed(() =>
   font-weight: 600;
 }
 
+.timeline-chart {
+  min-width: 720px;
+}
+
 .timeline-scale,
 .timeline-track {
   position: relative;
-  display: grid;
-  grid-template-columns: repeat(24, 1fr);
 }
 
 .timeline-scale {
+  height: 30px;
   color: #667085;
   font-size: 12px;
 }
 
 .timeline-scale__tick {
-  position: relative;
+  position: absolute;
+  top: 0;
+  white-space: nowrap;
+  transform: translateX(-50%);
 }
 
-.timeline-scale__tick::after {
-  position: absolute;
-  top: 18px;
-  right: 0;
-  width: 1px;
-  height: 12px;
-  background: #e4e7ec;
-  content: '';
+.timeline-scale__tick.is-start {
+  transform: none;
+}
+
+.timeline-scale__tick.is-end {
+  transform: translateX(-100%);
 }
 
 .timeline-track {
@@ -252,7 +305,11 @@ const timelineRows = computed(() =>
 }
 
 .timeline-track__hour {
-  border-right: 1px solid #edf1f7;
+  position: absolute;
+  top: 0;
+  bottom: 0;
+  width: 1px;
+  background: #edf1f7;
 }
 
 .timeline-segment {
diff --git a/src/views/mes/energydevicecheck/index.vue b/src/views/mes/energydevicecheck/index.vue
index 79ef229d..63078a76 100644
--- a/src/views/mes/energydevicecheck/index.vue
+++ b/src/views/mes/energydevicecheck/index.vue
@@ -28,7 +28,7 @@ v-model="queryParams.timeRange" type="datetimerange" value-format="YYYY-MM-DD HH
           format="YYYY-MM-DD HH:mm:ss"
           :start-placeholder="t('EnergyManagement.EnergyDeviceCheck.searchTimeRangeStartPlaceholder')"
           :end-placeholder="t('EnergyManagement.EnergyDeviceCheck.searchTimeRangeEndPlaceholder')"
-          :default-time="[new Date('2000-01-01 00:00:00'), new Date('2000-01-01 23:00:00')]"
+          :default-time="[new Date('1 00:00:00'), new Date('1 23:59:59')]"
           :shortcuts="timeRangeShortcuts"
           :disabled-time="getDisabledTime" class="!w-360px " popper-class="energydevicecheckPicker" />
       </el-form-item>
@@ -103,6 +103,7 @@ v-if="getPointDetailsRows(scope.row).length" :data="getPointDetailsRows(scope.ro
 import download from '@/utils/download'
 import { EnergyDeviceApi, EnergyDeviceDataRecordVO } from '@/api/mes/energydevice'
 import { OrganizationApi } from '@/api/mes/organization'
+import dayjs from "dayjs";
 
 defineOptions({ name: 'EnergyDeviceCheckRecord' })
 
@@ -244,7 +245,11 @@ const queryParams = reactive({
   pageSize: 10,
   name: undefined as string | undefined,
   orgId: undefined as string | number | undefined,
-  timeRange: buildDefaultTimeRange(),
+  //timeRange: buildDefaultTimeRange(),
+  timeRange: [
+    dayjs().subtract(1, 'day').startOf('day').format('YYYY-MM-DD HH:mm:ss'),
+    dayjs().subtract(1, 'day').endOf('day').format('YYYY-MM-DD HH:mm:ss')
+  ] as string[],
   startTime: undefined as string | undefined,
   endTime: undefined as string | undefined
 })