High-pressure boiler provided with full-automatic water adding device

The utility model relates to a high-pressure boiler provided with a full-automatic water adding device, comprising a boiler body which is provided with a water tower that is internally connected with a tap water pipeline provided with a self-contained floating ball controller; the water tower that is internally provided with three water adding tanks, the upper parts of which are respectively connected with a steam ascending pipe, and the steam ascending pipes that are arranged under the water tank are respectively connected with an emptying valve laterally, connected with a steam pipeline andcontrolled by the respective steam ascending pipe; the lower parts of the three water adding tanks are respectively connected with the bottom of the water tower and controlled by a water feeding valve inside the tank; the bottoms of the three water adding tanks are respectively connected with a water adding pipe of the boiler and controlled by a water adding valve; the pipelines are arranged at the lower parts, communicated with each other and controlled a steam-water conversion valve; an excess pressure and heat return water pipe is connected to the bottom of the water tower from the boiler body, and a check valve is installed at an outlet of the excess pressure and heat return water pipe; and the valves implement automated procedures by a small relay and a time relay. The high-pressure boiler utilizes the self steam pressure to automatically add water and recovers the excess heat of the boiler, thus saving energy.