The invention relates to an explosion-proof device for liquid ammonia production and using places, in particular to an explosion-proof water bag capable of solving technical problems. An acetic acid solution with a certain concentration is injected into a water bag body, the two sides of the water bag body are each provided with multiple hanging rings. The hanging rings are connected with hanging beams through hanging hooks, and the water bag body is fixed to the two hanging beams. One side of the water bag body is close to a liquid ammonia pipeline, and the other side of the water bag body is close to a bag breaking hook. The bag breaking hook is welded to the hanging beam on the same side, the end of the hanging beam is fixed to a rolling bearing and can be driven by a motor to roll, and the hanging beam on the other side is fixed to a wall. The motor is controlled by an ammonia concentration monitoring sensor. When ammonia concentration in air in the working environment exceeds a specified value, the motor is started and drives the bearing to enable the bag breaking hook to scratch the water bag body, the solution forms a water curtain to flow out, ammonia is absorbed in advance, and an alarm is given to workers. When the liquid ammonia pipeline is exploded, a large number of water bag bodies are automatically exploded or rapidly collide with bag breaking hooks to be exploded, a large number of continuous acetic acid solution water curtain walls are formed, ammonia is absorbed, explosion transfer is blocked, and a certain cooking effect is achieved.