A manufacturing method of a power module, comprising: providing a group of switch elements, the group of switch elements comprising at least one pair of switch elements; the method further comprising: providing an integral connector, the integral connector integrating a signal terminal, a power terminal and a connecting portion, wherein the power terminal comprises a positive power terminal, a negative power terminal and an output power terminal, the connecting portion integrates the signal terminal, the positive power terminal, the negative power terminal and the output power terminal together into the integral connector, and wherein the positive power terminal and the negative power terminal are respectively a first metal layer and a second metal layer, the first metal layer and the second metal layer being at least partially stacked, with an insulating layer disposed between the first metal layer and the second metal layer; electrically connecting the integral connector to the group of switch elements, wherein the signal terminal is electrically connected to a signal end of the group of switch elements, and the power terminal is electrically connected to a power end of the group of switch elements; providing a molding part, packaging the group of switch elements and fanning out the signal terminal and the power terminal from the molding part; and trimming the integral connector. providing a group of switch elements, the group of switch elements comprising at least one pair of switch elements; the method further comprising: providing an integral connector, the integral connector integrating a signal terminal, a power terminal and a connecting portion, wherein the power terminal comprises a positive power terminal, a negative power terminal and an output power terminal, the connecting portion integrates the signal terminal, the positive power terminal, the negative power terminal and the output power terminal together into the integral connector, and wherein the positive power terminal and the negative power terminal are respectively a first metal layer and a second metal layer, the first metal layer and the second metal layer being at least partially stacked, with an insulating layer disposed between the first metal layer and the second metal layer; electrically connecting the integral connector to the group of switch elements, wherein the signal terminal is electrically connected to a signal end of the group of switch elements, and the power terminal is electrically connected to a power end of the group of switch elements; providing a molding part, packaging the group of switch elements and fanning out the signal terminal and the power terminal from the molding part; and trimming the integral connector. providing an integral connector, the integral connector integrating a signal terminal, a power terminal and a connecting portion, wherein the power terminal comprises a positive power terminal, a negative power terminal and an output power terminal, the connecting portion integrates the signal terminal, the positive power terminal, the negative power terminal and the output power terminal together into the integral connector, and wherein the positive power terminal and the negative power terminal are respectively a first metal layer and a second metal layer, the first metal layer and the second metal layer being at least partially stacked, with an insulating layer disposed between the first metal layer and the second metal layer; electrically connecting the integral connector to the group of switch elements, wherein the signal terminal is electrically connected to a signal end of the group of switch elements, and the power terminal is electrically connected to a power end of the group of switch elements; providing a molding part, packaging the group of switch elements and fanning out the signal terminal and the power terminal from the molding part; and trimming the integral connector.