The utility model relates to a safety hammer and solves the problem that the safety is poor. According to the technical scheme, a containing groove is formed in the lower end face of a hammer handle, scissors used for shearing a safety belt is arranged in the containing groove, a first long hole and a second long hole are symmetrical along the axis of the hammer handle, the lower end portion of the hammer handle is sleeved with a safety shield, a sliding block is arranged on one scissor arm of the scissors in a matched mode, the sliding block penetrates through the first long hole, a flattening surface matched with the groove wall of the containing groove is arranged on the other scissor arm of the scissors, the hole width of the first long hole is less than the width of each scissor arm, the hole width of the second long hole is larger than the width of each scissor arm, a fixing block is fixed on the side wall of the hammer handle, the fixing block is connected with a spring, the tail end of the spring is fixedly connected with the sliding block, the distance between the fixing block and the hammer handle is less than the distance between the first long hole and the hammer handle, the width of the first long hole is matched with the width of the sliding block, and a reset spring is arranged between the two scissor arms of the scissors.