Hydraulic screen changer nozzle, made of alloy steel, forged, milled, ground, wire-cut, and processed with multi-level tempering and nitriding hardening, boasts high strength and ultra-hard material properties. It ensures reliable long-term operation without material leakage under high clamping force and frictional sliding conditions. The screen changer is designed with an internal mandrel heating system, powered by a high-speed, high-pressure hydraulic cylinder to facilitate screen changes. Driven by a high-flow hydraulic station, it offers the distinct advantages of easy screen changes and automatic positioning. It effectively meets the requirements for safe, fast, labor-saving granulation without interrupting the screen change process. The hydraulic screen changer features a simple structure, easy maintenance, and low failure rate, making it a popular high-end offline filter or screen changer in the plastic recycling industry.