The invention relates to an instrument circuit board buckle type structure. According to the instrument circuit board buckle type structure, a mounting support comprises a chamber, at least three bearing seats arranged in the chamber, and a detachable baffle board, wherein the mounting support has at least two clamping pins which extend downwards and has a hook, one side of the chamber is provided with at least one inverted L-shaped fixing buckle, the other side is provided with at least one elastic buckle, the at least one fixing buckle and the elastic buckle in the chamber are correspondingly provided with the bearing seats, the elastic buckle comprises a hook body and an elastic column arranged at a lower portion of the hook body, the top portion of the hook body is provided with a guide inclination plane, the front portion of the chamber is provided with at least one angular limit seat, and the at least one angular limit seat is correspondingly provided with the bearing seat in the chamber. The structure is simple and compact and can satisfy mounting requirements of various types of secondary circuit boards, good versatility is realized, the secondary circuit boards can be prevented from being wrongly mounted, but also rapid mounting or replacement can be realized, and manufacturing cost can be reduced.