The invention discloses a power test simulation device suitable for an electric vehicle. The power test simulation device comprises a set of power motor test bench, a set of power steering pump motor test bench and a set of air pump motor bench; the power test simulation device further comprises an accelerator pedal, a brake pedal, a steering wheel with a rotation angle sensor, a power battery, two storage batteries and a computer installed with simulation driving software. According to the power test simulation device of the invention, the simulation driving software is utilized to simulate the road information of an electric vehicle road condition test; the three sets of motor benches are utilized to simulate the power and load of the electric vehicle road condition test; and therefore, the road condition simulation test of an electric vehicle power device can be realized. With the power test simulation device of the invention adopted, the cost of the electric vehicle power device can be decreased, and the security of the electric vehicle power device can be improved.