The invention provides an infrared hot riveting machine. The infrared hot riveting machine comprises an air cylinder, a connecting part and a riveting head. The riveting head comprises a connecting body. A reflector, an infrared heating tube, a first blowing channel and a second blowing channel are arranged in the connecting body, the infrared heating tube is fixed to the bottom of the connectingbody, the reflector is arranged on the top of the infrared heating tube, both the first blowing channel and the second blowing channel communicate to a riveting cavity, and a reflective hood and a vent hole are formed in the riveting cavity. By arranging the reflector on the top of the infrared heating tube and arranging the reflective hood in the riveting cavity, high strength infrared radiationgenerated by the infrared heating tube can be reflected to a plastic joint, so that the plastic joint is quickly heated to be melted, and meanwhile, during heating, air is blown to the riveting cavitythrough the first blowing channel, so that air convection is generated in the riveting cavity to transfer heat, and therefore, the heating efficiency of the infrared heating tube is improved, and theproblem that the work efficiency of the infrared riveting machine is affected as the plastic joint of an existing infrared riveting machine is heated relatively slowly and is relatively large in heatloss is solved.