To　deal　with　the　model　uncertainty　and　external　disturbance　which　may　exist　in　series　hybrid　electric　vehicle　BJUT-SHEV＇s　stop　and　go　condition,　an　adaptive　sliding　mode　control　method　based　on　nonlinear　disturbance　observer　theory　is　proposed.　In　the　method　the　nonlinear　disturbance　observer　is　introduced　to　estimate　system　uncertainty,　and　the　estimate　value　is　used　to　compensate　control　outputs　which　to　improve　sliding　mode　controller＇s　performance　and　robustness.　In　addition,　for　controller　output　chattering　case　an　adaptive　law　is　designed,　under　the　adaptive　law　the　sliding　mode　controller＇s　switching　gain　can　be　adjusted　automatically.　The　Lyapunov　method　is　applied　to　prove　the　stability　of　the　control　method.　Finally,　the　simulation　results　of　an　example　are　investigated　to　show　the　feasibility　and　effectiveness　of　the　proposed　approach.