diff --git a/blink/renderer/core/html/parser/html_document_parser.cc b/blink/renderer/core/html/parser/html_document_parser.cc
index 7166d5aca35994cf22153fe15bb12a3f7ca88dbc..3868a5c0c41d765eda88c32af8aa004a4c50ed0e 100644
--- a/blink/renderer/core/html/parser/html_document_parser.cc
+++ b/blink/renderer/core/html/parser/html_document_parser.cc
@@ -88,6 +88,11 @@ constexpr int kDefaultMaxTokenizationBudget = 250;
 constexpr int kInfiniteTokenizationBudget = 1e7;
 constexpr int kNumYieldsWithDefaultBudget = 2;
 
+#if BUILDFLAG(IS_OHOS)
+constexpr int kOptimizedMaxTokenizationBudget = 100;
+static bool kUseOptimizedBudget = false;
+#endif
+
 class EndIfDelayedForbiddenScope;
 class ShouldCompleteScope;
 class AttemptToEndForbiddenScope;
@@ -186,6 +191,14 @@ bool IsPreloadScanningEnabled(Document* document) {
          document->GetSettings()->GetDoHtmlPreloadScanning();
 }
 
+#if BUILDFLAG(IS_OHOS)
+void SetOptimizeParserBudgetEnabled(bool enable) {
+  LOG(DEBUG) << "OptimizeParserBudget set enable: " << enable;
+  TRACE_EVENT1("blink", "SetOptimizeParserBudgetEnabled", "enable", enable);
+  kUseOptimizedBudget = enable; 
+}
+#endif
+
 base::TimeDelta GetDefaultTimedBudget() {
   static const base::FeatureParam<base::TimeDelta> kDefaultParserBudgetParam{
       &features::kTimedHTMLParserBudget, "default-parser-budget",
@@ -642,6 +655,9 @@ bool HTMLDocumentParser::PumpTokenizer() {
       (task_runner_state_->TimesYielded() <= kNumYieldsWithDefaultBudget)
           ? task_runner_state_->GetDefaultBudget()
           : kInfiniteTokenizationBudget;
+#if BUILDFLAG(IS_OHOS)
+  budget = kUseOptimizedBudget ? kOptimizedMaxTokenizationBudget : budget;
+#endif
 
   base::TimeDelta timed_budget;
   if (TimedParserBudgetEnabled())
@@ -712,6 +728,16 @@ bool HTMLDocumentParser::PumpTokenizer() {
           elapsed_time = chunk_parsing_timer.Elapsed();
         }
         should_yield = elapsed_time >= timed_budget;
+#if BUILDFLAG(IS_OHOS)
+        if (kUseOptimizedBudget) {
+          should_yield = should_yield || budget <= 0;
+          if (should_yield) {
+            LOG(DEBUG) << "OptimizeParserBudget in PumpTokenlizer. current parse tokens: " << tokens_parsed <<
+                ". left token budget: " << budget <<
+                ". elapsed time: " << elapsed_time;
+          }
+        }
+#endif
       } else {
         should_yield = budget <= 0;
       }
diff --git a/blink/renderer/core/html/parser/html_document_parser.h b/blink/renderer/core/html/parser/html_document_parser.h
index c196588137da1fbc554c3fc27916a424fc77b6a4..a4bad36ea30b23f17292d1e80220e73c45c73f7c 100644
--- a/blink/renderer/core/html/parser/html_document_parser.h
+++ b/blink/renderer/core/html/parser/html_document_parser.h
@@ -84,6 +84,10 @@ enum ParserPrefetchPolicy {
 void CORE_EXPORT ResetDiscardedTokenCountForTesting();
 size_t CORE_EXPORT GetDiscardedTokenCountForTesting();
 
+#if BUILDFLAG(IS_OHOS)
+void CORE_EXPORT SetOptimizeParserBudgetEnabled(bool enable);
+#endif
+
 class CORE_EXPORT HTMLDocumentParser : public ScriptableDocumentParser,
                                        private HTMLParserScriptRunnerHost {
  public:
diff --git a/blink/renderer/core/paint/timing/paint_timing.cc b/blink/renderer/core/paint/timing/paint_timing.cc
index b1c947b887bbceea505e92d675d4da668473fd6a..044bdfdf63b65371f6f354f8f745946b24806566 100644
--- a/blink/renderer/core/paint/timing/paint_timing.cc
+++ b/blink/renderer/core/paint/timing/paint_timing.cc
@@ -15,6 +15,7 @@
 #include "third_party/blink/renderer/core/frame/local_dom_window.h"
 #include "third_party/blink/renderer/core/frame/local_frame.h"
 #include "third_party/blink/renderer/core/frame/local_frame_view.h"
+#include "third_party/blink/renderer/core/html/parser/html_document_parser.h"
 #include "third_party/blink/renderer/core/inspector/console_message.h"
 #include "third_party/blink/renderer/core/loader/document_loader.h"
 #include "third_party/blink/renderer/core/loader/interactive_detector.h"
@@ -350,6 +351,11 @@ void PaintTiming::SetFirstContentfulPaintPresentation(base::TimeTicks stamp) {
   TRACE_EVENT_INSTANT_WITH_TIMESTAMP0("benchmark,loading",
                                       "GlobalFirstContentfulPaint",
                                       TRACE_EVENT_SCOPE_GLOBAL, stamp);
+#if BUILDFLAG(IS_OHOS)
+  LOG(DEBUG) << "OptimizeParserBudget FCP reset budget.";
+  TRACE_EVENT0("blink", "PaintTiming::SetFirstContentfulPaintPresentation");
+  blink:SetOptimizeParserBudgetEnabled(false);
+#endif
   first_contentful_paint_presentation_ = stamp;
   bool is_soft_navigation_fcp = false;
   if (first_contentful_paint_presentation_ignoring_soft_navigations_