The invention discloses a building wall surface detection structure, and relates to the technical field of wall surface detection, and the building wall surface detection structure comprises an angle adjusting frame, a supporting rod, a connecting block, a connecting rod, a limiting chute, an adjusting plate, an adjusting screw rod and a working rod, an adjusting motor is fixedly connected on the side wall of the angle adjusting frame, and the output end of the adjusting motor is provided with a rotating plate used for driving the supporting rod to horizontally push, so that the supporting rod moves to drive the connecting rod to vertically slide along the limiting sliding groove through the connecting block. According to the building wall surface detection structure, the adjusting plate is arranged, in the angle adjusting frame, the pushing motor works to drive the threaded sliding block to vertically slide through the adjusting screw rod, the threaded sliding block moves to drive the adjusting plate to move through the working rod, so that the adjusting plate moves to drive the adjusting rod to slide along the outer wall of the angle rod, and the angle of the measuring scale is conveniently adjusted through the movement of the adjusting plate, and thus the detection operation of the wall body with the inclination angle is realized.