New development of a fuel supplying system in CARDC is presented in this paper. The system uses a piston to squeeze gas fuel to the heater of pulse facilities. With very simple structure and high safety coefficient, the system achieves the purpose of controllably supplying fuel with needed amount to the heater, and also can feed fuel with constant mass flow rate in the fixed testing interval. The system has been applied successfully to the newly built pulse combustion wind tunnel with diameter of 600mm.
