Abstract: In response to the requirements for efficiency, accuracy and safety of shock wave testing, a wireless shock wave overpressure test system was developed by using 4G wireless communication technology and storage testing methods. A study on the transmission performance of ground antennas was carried out, and a free-space modified model was established, which characterizes the relationship between the reference signal received power P_RSR and any transmission distance L. The experiment results show that the theoretical value is in good agreement with the experimental value, and the P_RSR decreases with the increase of L. Within a certain range, the ground influence factor ω decreases with the increase of the antenna height at the receiving end, the free space transmission path loss L_F decreases and the P_RSR increases accordingly.