The invention provides a swing welding method to solve the technical problems in the prior art that a rotating welding method cannot be used for welding to-be welded two parts with limited part sizes, and other welding methods produce low welding quality but require high cost. The method comprises the following steps: a mounting and locating step in which two parts to be welded are mounted and located; an attaching step in which the two to-be-welded surfaces of the two parts are attached; a swing step in which one or two of the two parts to be welded are swung, and opposite rotating friction is produced between the two surfaces to be welded so as to generate heat and melt the materials of the two surfaces to be welded; a swing stopping step in which swing is not stopped until the part is swung to a position required by product design; a cooling step in which the two parts to be welded are cooled until the two parts to be welded are connected into a whole; and a removing step in which the two parts to be welded are removed. The invention further provides swing welding equipment for implementing the swing welding method.