The high-pressure water jet line removal equipment is a machine that generates power from a diesel engine and transmits it to a high-pressure water pump to reach the operating pressure of natural water. Then, through a special actuator (handcart) and nozzle, it sprays highly concentrated water flow at extremely high speed. This water flow has tremendous impact energy and continuously acts on the surface of the object (marking line) being cleaned and removed, causing it to be impacted, broken, detached, and washed away by high-speed water flow, achieving the purpose of cleaning and removing the marking line. Then, the diesel engine drives the fan to empower the vacuum pump for recycling work, and the slag water separation is achieved through a structural separation device. Finally, automatic slag discharge technology is used for slag discharge treatment, which is convenient, fast, environmentally friendly and safe.