Aimed at the deflagration and detonation problem caused by the geometrical features change of bullet gunpowder brought by bullet structure deformation during the penetration process, a projectile-borne storage testing system was developed to acquire the stress and strain state of projectile. This system based on FPGA+STM32 dual controller realized the function of multi-channel strain signal conditioning collection, data storage and communication. The system adopted the strain signal as the inner trigger signal and used the digital potentiometer realizing the automatic strain bridge balancing to reduce the strain signal offset caused by temperature variation and strain gauge sticking deformation. The STM32 program-controlled power supply is used to launch the main acquisition system at fixed time to reduce the power consumption. The verification test shows that the system can complete the sampling and data storage of strain signals, and it has certain application value for penetrating strain test.