The invention discloses an electric vehicle charging method based on a mobile charger mode. The electric vehicle charging method includes the steps: initializing charging demand parameters of M EV (electric vehicles) and operating state parameters of N MC (mobile chargers); setting m=1 and n=1; judging whether m is less than or equal to M or not; executing the step 4 if m<=M; otherwise, finishing calculation of charging schemes of the M electric vehicles; calculating and outputting the charging scheme of the m electric vehicle and charging service station operating parameters, and updating the operating state parameters of the mobile chargers; assigning m+1 to m, and setting n=1; executing the step 3. The electric vehicle charging method can provide viable charging schemes for electric vehicle users based on the mobile charger mode, overcomes the shortcomings of limitation of fixed charging facilities by distribution network capacity and the number of parking spaces and accordingly solves the problem of charging difficulty of the electric vehicles in old urban areas of tier one and two cities.