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In order to verify the key technologies such as the integrated design method of the control system and power system of the solid impact engines and the reliable turning stage, a free jet test method for the integration of the control system and power system of the solid impact vehicle is proposed. The composition and working principle of the test system are introduced, the core of the hardware design include of grounding design method and power supply capability and load matching analysis method are introduced. The software work flow and test program of each system are put forward. The test results show that the test system works stably, the air flow conditions are simulated normally, the control system and power system work normally, the solid rocket engine can rotate reliably and adjust the thrust normally according to the procedure, the angle of attack, sideslip angle, mach are measured, the test result can effectively support to carry out the key technology research and evaluation.