Universal joint for quickly inflating high-pressure air cylinders of positive pressure air breathers

The utility model provides a universal joint for quickly inflating high-pressure air cylinders of positive pressure air breathers. The universal joint for quickly inflating high-pressure air cylinders of the positive pressure air breathers comprises an adapter assembly, a joint assembly, a connection base, a hexagonal nut, a four-way pipe, a pressure meter, a valve assembly, a discharging valve and a hose joint, wherein the connection base is sleeved on the joint assembly and is capable of moving forth and back; an inflating joint is arranged at the end of the joint assembly; the joint assembly is in threaded meshing with the adapter assembly through the connection base and used for controlling butt joint between the inflating joint at the end of the joint assembly and a cylinder head valve joint nozzle; the four-way pipe comprises four pipe joints; four pipe joints are respectively connected to the joint assembly, the pressure meter, the valve assembly and the discharging valve; and the hose joint is connect