Abstract: Formissionsofshorttermvisitstothemoon,thelunarascentstagerequirestheascendingmoduletoRendezvousanddock
interfacewiththecabininnoncoplanarity.Asolutiontosolveforthechangeoftheangleofascentplane(referredtoaswedgeangle)  wasproposed，andwedgeangleoftheascendingorbitwasgivenbyusingthethreelinetheoremtoreducethedemandoftheemergencyreturntasktoreducetheworstplaneofthewholemissionperiod.Themethodofsolvingtheinclinationofthelandingtrackandtheascendingorbitwasgiven.Thesimulationresultsshowthattheproposedmethodissimpleandaccurate,providingreferenceforthedesignandanalysisofhumanlunarlanding.

Key words: lunar, humanlunarlanding, emergencyreturn, wedgeangle, orbitalinclination