Mounting structure of printed circuit board

The utility model relates to a mounting structure of a printed circuit board, which comprises a fixing plate, four T-shaped positioning blocks are fixedly mounted at the top of the fixing plate, an adjusting ring is slidably mounted outside the T-shaped positioning blocks, a fixing mechanism is arranged in the adjusting ring, a buffer mechanism is arranged in the adjusting ring, and the fixing mechanism and the buffer mechanism are fixedly mounted on the fixing plate. The fixing mechanism comprises a positioning screw, a limiting block and a fastening nut, the positioning screw is slidably mounted in the adjusting ring, the limiting block with one end making contact with the adjusting ring is fixedly mounted on the back face of the positioning screw, and the fastening nut is in threaded connection with the front face of the positioning screw. According to the installation structure of the printed circuit board, through the arrangement of the fixing mechanism, the buffering mechanism, the supporting plate, the