The utility model discloses a splicing type exhibition building structure which comprises a supporting plate and I-shaped pieces, T-shaped grooves are formed in the front end, the rear end and the two sides of the supporting plate, the I-shaped pieces are clamped in the T-shaped grooves, two installation frames are fixedly installed at the bottom end of the supporting plate, and rotating frames are rotationally connected in the two installation frames. Positioning discs are fixedly installed at the front end and the rear end of each rotating frame, U-shaped frames are arranged on the sides, away from each other, of the two mounting frames at the bottom end of the supporting plate, and positioning rods are fixedly installed on the sides, close to the positioning discs, of the U-shaped frames. According to the spliced exhibition building structure, the multiple supporting plates can be quickly assembled, so that the working efficiency of exhibition stage building is further improved, meanwhile, the rotating frame and the supporting plates can be quickly shielded when the spliced exhibition building structure does not need to be used, the overall size is reduced, and the spliced exhibition building structure is convenient to carry; and the supporting height of the supporting plate can be quickly adjusted according to use requirements, so that the applicability of the equipment is further improved.