Mounting structure of house building guardrail

The utility model relates to the technical field of house building protection, in particular to a mounting structure of a house building guardrail, which comprises a glass plate, a plurality of upright posts and handrails, the upright posts are mounted on a floor at equal intervals, and the handrails are positioned at the tops of the upright posts; the two ends of the handrail are detachably connected with the stand columns respectively. The top of the glass plate is detachably connected with the handrail; a sliding block is transversely arranged on the glass plate in a sliding mode, and a sliding hole for the sliding block to slide in is formed in the stand column. A connecting groove communicated with the sliding hole is formed in the stand column in the vertical direction, a locking piece is arranged in the connecting groove in an axial sliding mode, a driving piece used for driving the locking piece to slide is arranged in the connecting groove, and a locking groove allowing the locking piece to be insert