Automatic water addition device for water tank of concrete curing room

The utility model relates to an automatic water addition device for a water tank of a concrete curing room. The automatic water addition device comprises a steam burning water tank, wherein an electric heating pipe is arranged in the steam burning water tank; a water replenishing tank is arranged near the steam burning water tank and is communicated with the steam burning water tank by a connection water pipe; a water inlet pipe is communicated with the water replenishing tank; and a ball floating valve is arranged in the water replenishing tank. According to the automatic water addition device for the water tank of the concrete curing room, water is replenished by the water replenishing tank and the water replenishment is controlled automatically by the ball floating valve according to the principle of 'a communicating vessel', so that the water-level height of the steam burning water tank can be kept, steam can be burned in the water tank normally, the temperature and humidity of the curing room in winter a