Based　on　the　Jialing　Motorcycle　JL50QZC,　a　series　of　hybrid　control　systems　including　the　DC　brushless　motor　and　LPG　engine　relied　on　speed　are　developed　without　changing　the　major　structure　of　the　engine.　Through　the　engine　performance　test,　the　control　parameters　of　matching　the　hybrid　engine　have　been　optimized.　The　motor　Driving　Force-Resistance　stable　diagram　is　obtained　by　calculating,　and　thus　the　control　parameters　which　match　the　hybrid　motor　is　optimized.　The　control　policy　of　hybrid　motorcycle　and　the　velocity　point　for　driving　switch　by　comparison　of　control　parameters　with　electric　engines　are　acquired.　The　validity　of　control　policy　and　the　stationarity　of　driving　switch　is　verified　via　tests　on　roads.