An air valve body of heater, including regulating valve used to regulate air output, which is arranged on air valve body. Valve rod of regulating valve extends into air valve body. air valve body has two solenoid valves used to control on and off of gas; the first solenoid valve is arranged on the side of air valve body's inlet pipe; the second solenoid valve is arranged on the side of outlet pipe; the inlet pipe and the outlet pipe vertically space intersect. Solenoid valve is arranged on solenoid valve seat at the side of inlet pipe; under the solenoid valve seat is arranged a solenoid valve chamber connecting with inlet pipe; the solenoid valve chamber communicates with the parallel air pipe arranged under it through connecting passage arranged under the solenoid valve chamber; the parallel air pipe is parallel to the axis of inlet pipe. On the air valve body is arranged gas pipe joint, which is arranged at the side of inlet pipe; valve rod of regulating valve extends into outlet pipe; the axis of air pipe joint vertically space intersects with both axes of inlet pipe and outlet pipe. The utility model has simple structure, small size and low manufacture cost.