Petroleum wellhead gas treatment device

The petroleum wellhead gas treatment device comprises a wellhead, a plurality of gas suction valves are arranged at the top of the wellhead, a connecting plate is fixedly connected to the tops of the gas suction valves, filter cotton is fixedly connected to the middle position of the connecting plate, and a first box body is fixedly connected to the top of the connecting plate; a fixing plate is fixedly connected to the bottom of the interior of the first box body, electric sliding rails are fixedly connected to the two sides of the fixing plate, sliding blocks are slidably connected to the surfaces of the electric sliding rails, and a filter hole plate is fixedly connected to the tops of the sliding blocks. In the device, in order to clean the side wall of the device body, a cleaning pipe is arranged on one side of the first box body, a cleaning spray head is arranged at the top of the cleaning pipe and sprays water to the surface of the first box body, and meanwhile, a cleaning brush at one end of an electr