Built-in booster fracture bomb

The invention discloses a fracture bomb, which comprises an explosion proof device (1), a powder accommodation shell (2) and main powder(4); the main powder (4) is arranged in the powder accommodation shell (2); and the explosion proof device (1) is used for blocking direction action of impact waves or air on the fracture bomb, so the time of igniting the main powder (4) is prolonged, the impact waves pass through the explosion proof device and is attenuated to a lower peak pressure; and the peak pressure generated by a perforating bullet is prevented from being overlapped with the peak pressure generated by the fracture bomb, so time interval between the two peaks is prolonged, and the secondary booster effect of the built-in booster fracture bomb on stratum is greatly improved.