The utility model provides a pressure control valve subassembly and fuel injection apparatus. The pressure control valve subassembly includes: a housing. Form and inject the disk seat of cavity by the casing, formation is with the throttling passage with pressure control chamber and cavity intercommunication in the casing, formation in the casing and with the return flow line of cavity intercommunication, can be in the casing longitudinal movement's actuating lever, install on the actuating lever and be used for the shutoff or open throttling passage's sealed cone, an actuating device for the actuator disk actuating lever, and be used in the spring on the actuating lever. Sealed cone is including sealed head, and sealed head includes truncated cone shape part and the 2nd truncated cone shape or the conical part that link to each other with truncated cone shape part, forms a ring line between truncated cone shape part and the 2nd truncated cone shape or the conical part, and sealed cone is the surface formation sealing contact with the cavity in the ring line position. According to the utility model discloses, can prevent at regional cavitation erosion or the grain wear of producing of disk seat to ensure the fuel injection apparatus reliability service.