Assembly type air valve well

The utility model provides an assembly type air valve well which comprises a water supply main pipeline, a three-way pipe, a ventilation branch pipe and an air valve, the water supply main pipeline is connected with the three-way pipe through a rigid connector, the other end of the three-way pipe is connected with the ventilation branch pipe, and the ventilation branch pipe extends out of an underground broken stone hardcore. The valve well bottom plate, the valve well cylinder body, the valve well top plate, the ventilation pipe and the sealing well lid are preset, the valve well bottom plate is arranged on the broken stone hardcore, the air valve is connected with the ventilation branch pipe, the valve well cylinder body is connected with the valve well bottom plate through cement mortar, and the valve well top plate is connected with the top end of the valve well cylinder body through cement mortar; one end of the breather pipe extends into the valve well through the valve well cylinder body, the other end