The invention provides a mixed power-driven system comprising a motor, an engine, a clutch, an arrester, an output end, and a planetary gear mechanism provided with a first rotating element, a second rotating element and a third rotating element, wherein the motor is connected with the first rotating element, and the engine is connected with the first rotating element through the clutch; the arrester is connected with the second rotating element so as to control the second rotating element; and the output end is connected with the third rotating element. The engine and the motor are both connected with the first rotating element in the planetary gear mechanism, thereby the structure of the mixed power-driven system is simplified to a great extent, and the mixed power-driven system can be conveniently and precisely controlled.