In order to investigate the propagation rules and distribution characteristics of the explosion shock wave loading on thermobaric explosive and TNT explosive inside cylindrical devices, the internal blast experiments were carried out in cylindrical device, propagation rules of shock wave were analyzed, distribution characteristics of overpressure and timing integral impulse of the shock wave about two explosives of same mass were compared. The results show that superposition is characteristic of the shock wave in cylindrical device, and the superposition effect increases gradually with the increase of the distance between explosion source and measuring point, and the superposition effect of thermobaric explosive is more obvious than TNT; The average value of timing integral impulse of the shock wave on thermobaric explosive increases by 20.3% compared with TNT, the increase is about twice the average value of overpressure peak, which is more conducive to damage target than TNT in closed space.