Frame of track flaw detection car

The embodiment of the invention provides a frame of a track flaw detection car, which comprises a frame main body and at least one frame module, and the frame module is detachably and fixedly connected with the frame main body; the frame main body comprises two edge beams which are oppositely arranged; the sleeper beam comprises a sleeper beam main body and a transition part fixed at the end part of the sleeper beam main body, two ends of the transition part are respectively a small end and a large end, the transition part is gradually enlarged from the small end of the transition part to the large end of the transition part, and the small end of the transition part is fixed at one end of the sleeper beam main body; wherein the large end of the transition part is fixed on the inner side of the edge beam. According to the embodiment of the invention, the technical problems that the welding forming process of the frame of the traditional track flaw detection car is complicated and the frame cannot be detached a