The invention discloses a numerical control positioner of an airplane wing wall plate and belongs to the technical field of airplane assembly. The numerical control positioner of the airplane wing wall plate comprises a base, a vertical column mounted on the base and a telescopic column mounted on the vertical column. A mounting seat with a guide rail is arranged at the front end of the telescopic column. A ball head in-place mechanism is arranged on the mounting seat. A sliding block matched with the guide rail is arranged at the bottom of the ball head in-place mechanism. A locking mechanism fixing the sliding block in position is further mounted on the guide rail. The ball head in-place mechanism can be matched with a process ball head to form ball hinge connection, thus the process ball head can freely rotate in the ball head in-place mechanism, or a fixed object can be directly sucked by being replaced with a vacuum suction device. When the airplane wing wall plate deforms in the longitudinal direction due to changing of the temperature, the sliding block slides on the guide rail, temperature deformation of the airplane wing wall plate in the X direction is adapted, and accordingly the motion precision and positioning precision of equipment are improved.