According　to　the　characteristics　of　the　bicycle　traffic　flow,　the　bicycle　green　time　is　divided　into　the　maximum　queue　dissipation　time　and　the　time　of　bicycle　cluster　center　running　to　the　opposite　lane,　and　the　formulas　are　given　respectively　in　this　paper.　Validation　is　done　based　on　intersection　bicycle　data　of　Beijing　city　and　Tianjin　city.　Results　show　that　the　green　time　calculated　by　considering　the　bicycle　cluster　meets　the　interval　of　bicycles　passing　through　the　intersection,　which　enriches　the　signal　timing　algorithm　at　signalized　intersection.