The design structure of the quick twist lock brass threaded joint is compact, mainly composed of a threaded part, a locking mechanism, a sealing ring, etc. The threaded part complies with international standards and is compatible with a variety of pipes and joints. The locking mechanism is a highlight of the joint. Users only need to rotate the joint to the pipe connection port gently, and then fix it by quick-twist locking. The operation is simple and convenient, and no special tools are required. It docks the joint thread with the threaded part of the pipe, and rotates the joint to make the threaded part tightly combined with the pipe; then, the locking mechanism inside the joint automatically fixes the joint at the pipe connection port to ensure that the connection is stable and not loose; the sealing ring is responsible for sealing to prevent leakage during fluid or gas transmission.