In order to the fact that some parameters of a certain type of guided projectile are extremely narrow in pulse width during the flight and flight process, the missile load test system requires higher sampling rate, while the high sampling rate analog-to-digital converter (ADC) has high design cost and is difficult to design. Meet the comprehensive problem of the number of channels, sampling rate and sampling accuracy required. Based on the principle of low cost, miniaturization and high reliability, this paper proposes a method based on multi-ADC daisy chain design, which solves the problem of single ADC sampling rate limitation. High-speed data stream is processed by FPGA ping-pong operation to reduce buffer. The space and speed pressures have doubled the overall sampling rate, and a missile-loaded test system with high sampling rate, high acquisition accuracy, multiple channels, small size and low cost has been designed. The system can be widely applied to an environment with a small space of the missile body, and the missile load test task can be reliably completed without affecting the amount of the body"s own charge and the impact effect. The functional validity and test accuracy of the system are fully verified by experiments, which have certain engineering application value.