An injection molding apparatus configured to receive injection-molding melt to solidify the injection-molding melt into an injection molded part, wherein the injection molding apparatus comprises: • a fixed mold component, wherein an injection port and a transmission runner communicated with the injection port are formed in the fixed mold component, and the injection port is configured to be connected to a material injection apparatus, to receive the injection-molding melt injected by the material injection apparatus; • a movable mold component, wherein the movable mold component cooperates with the fixed mold component to mold the injection molded part, a molding groove is formed on a top portion of the movable mold component, the molding groove runs through the top portion of the movable mold component, and is communicated with the transmission runner, and the molding groove comprises a first side and a second side that are provided opposite to each other; • a first positive electrode module, wherein the first positive electrode module is located on the first side of the molding groove; and • a first negative electrode module, wherein the first negative electrode module is located on the second side of the molding groove, to correspond to the first positive electrode module, so as to cooperate with the first positive electrode module to form an electric field between the first side and the second side of the molding groove, and further to perform electric field excitation on the injection-molding melt that flows into the molding groove through the transmission runner; and at least one of the first positive electrode module or the first negative electrode module is insulated from the fixed mold component and the movable mold component, characterized in that • the first positive electrode module and the first negative electrode module are both disposed in the movable mold component, the first side of the molding groove is a side from which the injection-molding melt flows into the molding groove, the second side of the molding groove is a side from which the injection-molding melt flows out of the molding groove, the first positive electrode module is provided with a first through groove, a first port of the first through groove is communicated with the transmission runner, a second port of the first through groove is communicated with a first port of the molding groove, so that the injection-molding melt flows into the molding groove through the transmission runner and the first through groove, and a direction of an electric field formed between the first positive electrode module and the first negative electrode module is parallel to a flowing direction of the injection-molding melt that flows into the molding groove. • a fixed mold component, wherein an injection port and a transmission runner communicated with the injection port are formed in the fixed mold component, and the injection port is configured to be connected to a material injection apparatus, to receive the injection-molding melt injected by the material injection apparatus; • a movable mold component, wherein the movable mold component cooperates with the fixed mold component to mold the injection molded part, a molding groove is formed on a top portion of the movable mold component, the molding groove runs through the top portion of the movable mold component, and is communicated with the transmission runner, and the molding groove comprises a first side and a second side that are provided opposite to each other; • a first positive electrode module, wherein the first positive electrode module is located on the first side of the molding groove; and • a first negative electrode module, wherein the first negative electrode module is located on the second side of the molding groove, to correspond to the first positive electrode module, so as to cooperate with the first positive electrode module to form an electric field between the first side and the second side of the molding groove, and further to perform electric field excitation on the injection-molding melt that flows into the molding groove through the transmission runner; and at least one of the first positive electrode module or the first negative electrode module is insulated from the fixed mold component and the movable mold component, characterized in that • the first positive electrode module and the first negative electrode module are both disposed in the movable mold component, the first side of the molding groove is a side from which the injection-molding melt flows into the molding groove, the second side of the molding groove is a side from which the injection-molding melt flows out of the molding groove, the first positive electrode module is provided with a first through groove, a first port of the first through groove is communicated with the transmission runner, a second port of the first through groove is communicated with a first port of the molding groove, so that the injection-molding melt flows into the molding groove through the transmission runner and the first through groove, and a direction of an electric field formed between the first positive electrode module and the first negative electrode module is parallel to a flowing direction of the injection-molding melt that flows into the molding groove.