Follow-up pilot proportional valve

The invention provides a follow-up pilot proportional valve which comprises a valve body provided with a liquid outlet cavity, a liquid inlet cavity, a first main valve cavity and a second main valve cavity. The main valve element is arranged in the valve body in a sliding manner; the pilot sliding valve is arranged at the end, close to the control cavity, of the main valve element in a sliding mode, and the pilot sliding valve is used for opening and closing the radial throttling hole; and the driving device is used for driving the pilot slide valve to slide. According to the follow-up pilot proportional valve, the pilot sliding valve closes the radial throttling hole, so that the main valve element is pressed by closing force, the stability of the closing state is guaranteed, and the control precision, stability and consistency of the follow-up pilot proportional valve in the opening state are further improved; compared with other follow-up pilot proportional valves, the whole structure of the follow-up pil