The high pressure cleaning machine swivel joint is a key connecting component used to provide smooth fluid transport and pressure maintenance during high-pressure cleaning operations. It allows high-pressure pipelines and cleaning nozzles to rotate freely without affecting pressure transport, effectively preventing twisting and damage to high-pressure pipelines. Rotary joints are widely used in high-pressure cleaning fields such as industrial cleaning, automotive cleaning, and building maintenance, and are important components for improving equipment service life and work efficiency. The core principle of this rotary joint is to transfer high-pressure liquid to the connected nozzle or spray gun through two independent rotating structures inside and outside. The built-in sealing ring and bearing system ensure that there is no liquid leakage during the rotation process, while reducing frictional resistance, thus ensuring the long-term stable operation of the joint. Under high pressure conditions, the rotary joint can withstand extremely high water pressure while maintaining 360 degree free rotation, ensuring operational flexibility.