diff --git a/bms-front/src/views/report/arProfit/index.vue b/bms-front/src/views/report/arProfit/index.vue
index b4138c16..aaf2ade4 100644
--- a/bms-front/src/views/report/arProfit/index.vue
+++ b/bms-front/src/views/report/arProfit/index.vue
@@ -187,7 +187,7 @@ const salesOptions = ref([])
 const salesLoading = ref(false)
 let salesSearchVersion = 0
 const areaRules = ref({})
-const dateRange = ref([])
+const dateRange = ref(defaultBillDateRange())
 const pageNum = ref(1), pageSize = ref(10), total = ref(0), rows = ref([]), loading = ref(false)
 const summaries = ref([]), summaryLoaded = ref(false)
 const detailsVisible = ref(false), detailsLoading = ref(false), details = ref([]), detailsTotal = ref(0)
@@ -211,9 +211,18 @@ const missingRates = ref([]), missingTotal = ref(0), missingPage = ref(1), missi
 const confirmVisible = ref(false), confirmForm = reactive({ writeoffId: null, billNo: '', rate: null, remark: '' })
 const writeoffRatesVisible = ref(false), writeoffRatesLoading = ref(false), writeoffRates = ref([])
 
+function formatLocalDate(offset) {
+  const date = new Date()
+  date.setDate(date.getDate() + offset)
+  const year = date.getFullYear()
+  const month = String(date.getMonth() + 1).padStart(2, '0')
+  const day = String(date.getDate()).padStart(2, '0')
+  return `${year}-${month}-${day}`
+}
+function defaultBillDateRange() { return [formatLocalDate(-30), formatLocalDate(0)] }
 function params() { return { ...query, beginBillDate: dateRange.value?.[0], endBillDate: dateRange.value?.[1] } }
 function search() { pageNum.value = 1; loadRows(); loadSummary() }
-function reset() { Object.assign(query, { customerId: null, salesUserId: null, billNo: '', status: '' }); dateRange.value = []; search() }
+function reset() { Object.assign(query, { customerId: null, salesUserId: null, billNo: '', status: '' }); dateRange.value = defaultBillDateRange(); search() }
 function handleSalesInput() {
   salesSearchVersion++
   salesOptions.value = []