The invention relates to an adjustable positioning component for mounting a construction wall panel, which comprises an eccentric bolt the second screw of which penetrates an inner expansion bolt, wherein, the first screw of the eccentric bolt is sequentially equipped with a nylon clamping mat, a distance regulating sleeve and a first nut for preventing the distance regulating sleeve from being unscrewed and loosened from front to back; the inner sleeve of a sliding block is axially provided with an internal threaded through hole which is in threaded connection with the first screw, and the inner sleeve of the sliding block is engaged with the distance regulating sleeve; the inner sleeve of the sliding block and the nylon clamping mat are driven to move forward and backward on the first screw by turning the distance regulating sleeve; and the front end of the inner sleeve of the sliding block is inserted into a bridge-cut-off nylon sliding block, and the bridge-cut-off nylon sliding block is placed in a groove on the rear end of a transverse keel and is spaced from the transverse keel. The positioning component of the invention has adjusting capability and can conveniently adjust errors caused by that the hole is not perpendicular to a wall surface; and after being hung, the keel the advantages of has good flatness, simple operation and convenient construction.