The invention relates to a safety hammer, in particular to a safety hammer with a burglar alarm device for a bus. The safety hammer comprises a hammer body, the hammer body is connected with an alarm device, a switch, a power supply, a buzzer alarm, a smoke transducer and an illuminating lamp are in series connection in sequence to form a loop of the alarm device, a handle of the hammer body is inlaid into the switch, a normally closed contact is disposed in the switch, and when the hammer body is removed, the whole loop is powered on. The handle of the safety hammer for the bus is inlaid into the normally-closed switch, when the safety hammer is removed, the loop of the alarm device is powered on, the buzzer alarm in the loop rings, so that passengers and a driver in the bus can be timely warned, and the stolen rate of the safety hammer is effectively reduced. The smoke transducer is arranged in the loop of the alarm device of the safety hammer, when smoke density in the bus reaches a certain range, the smoke transducer sends a signal, and the illuminating lamp arranged beside the hammer body is turned on to clearly illuminate the specific position of the safety hammer.