Aiming at the problem of short-time high-speed and high-power airborne actuation, a scheme of using gas-liquid hybrid system as the actuation energy source was proposed. The accumulator characteristics were simulated under high and low temperature conditions, and the influence of airborne temperature conditions on the accumulator characteristics was analyzed. Combining the hydraulic oil volume required by the actuator and the storage target pressure and other factors, the design method of accumulator parameters and initial volume parameters of the gas cavity was proposed. The design results are simulated in the actuator system model, and the simulation results show that the proposed method can meet the system function and performance requirements under high and low temperature conditions. The method presented in this paper can be used as a reference for the research of gas-liquid hybrid energy system and a guide for engineering practice.