The present invention relates to a bidirectional output mixed hydraulic power system, which includes a hydraulic fluid that stores and contains therein a fluid tank； at least one electrical hydraulic pump connected to the fluid tank to draw in, pressurize, and output the hydraulic fluid； at least one mechanical hydraulic pump connected to the fluid tank to draw in, pressurize, and output the hydraulic fluid； at least two sequence check valves each connected to the electrical hydraulic pump and the mechanical hydraulic pump, each of the sequence check valves being set normally open in a first direction and preventing fluid returning in a second direction； and a dual pressure valve that is connected to the fluid tank and each of the sequence check valves for switching output direction of the hydraulic fluid.
