Multifunctional brake valve of trailer

The utility model provides a multifunctional brake valve of a trailer, and relates to the field of trailer brake valves. The second connecting piece is arranged at the top of the first connecting piece; the brake valve handle is arranged in the second connecting piece, and the brake valve handle is arranged in the second connecting piece; the clamping holes are formed in the two sides of the top of the first connecting piece; the clamping blocks are fixed to the two sides of the bottom of the second connecting piece; the threaded hole is formed in the clamping block; and the screw is clamped in the threaded hole. According to the multifunctional brake valve of the trailer, provided by the utility model, the valve handle of the brake valve can be quickly and conveniently replaced when being damaged, good dustproof and protection effects can be achieved in the storage or transportation process of the brake valve, and the use of the brake valve is better guaranteed for a longer time. 本实用新型提供一种挂车的多功能制动阀，涉及挂车制动阀领域