The invention provides a quick welding machine. The quick welding machine comprises a connector, a heat dissipation branch pipe, a heat transfer plate, a heating pipe, a conductive copper core, a heating wire, a thermistor and a liquid injection pipe. The heat transfer plate is attached to the lower end face of a soaking box. The heat dissipation branch pipe is installed inside the heat transfer plate. The heating pipe is installed inside a heating base. The conductive copper core is installed inside the heating pipe. The heating wire is winded around the annular side face of the conductive copper core. The thermistor is connected with the rear side of the heating pipe. The liquid injection pipe is installed on the upper side of the rear end face of the soaking box. The connector is installed on the left side of the soaking box. With the design of the quick welding machine, the problem that a welding machine in the prior art does not have the function of quickly heating soldering fluxis solved. The quick welding machine is reasonable in structure, and can quickly heat soldering flux, and the welding effect of the welding machine is effectively improved.