Adjustable L-shaped connecting piece and construction application structure of L-shaped connecting piece

The utility model discloses an adjustable L-shaped connecting piece and a construction application structure of the L-shaped connecting piece, and the adjustable L-shaped connecting piece comprises a horizontal part, a vertical part and a vertical part, a plurality of through holes which are uniformly distributed at intervals are formed in one end surface body of the horizontal part, and a T-shaped clamping body is fixed on one end surface body of the horizontal part; the vertical part is perpendicular to the horizontal part to form an L shape, two sliding bodies are fixed on the vertical part and distributed on the vertical part at intervals, clamping grooves are formed in the opposite surfaces of the two sliding bodies, and the T-shaped clamping bodies can be clamped in the clamping grooves to slide up and down. The T-shaped clamping body on the horizontal part can slide up and down to be clamped in the clamping groove, opposite to the two sliding bodies, of the vertical part to form an L-shaped connecting