Non-stop hydraulic screen changer, made of alloy steel,经过forging, milling, grinding, wire cutting, multi-level quenching, and nitriding hardening treatments, boasting ultra-hard material. It ensures long-term reliable operation under high clamping force and frictional sliding conditions, without material leakage. The screen changer is designed with an internal mandrel heating system and driven by a high-speed, high-pressure hydraulic cylinder to change screens, powered by a large-flow hydraulic station. It facilitates easy, automatic screen changes, effectively meeting the requirements for safe, fast, labor-saving, and non-stop-screen-changing granulation. The hydraulic screen changer has a simple structure, easy maintenance, and low failure rate, making it a highly popular advanced non-stop screen changer in the plastic recycling industry.