The invention discloses a method for correcting the offset of a reference camera. The method aims at solving the problem that the mounting accuracy of an existing chip mounter is low, and includes the specific steps that 1, the back face of a calibration glass plate is placed on a lens of a fixed camera, the reference camera is moved above the center of the fixed camera, and at the moment, the front face of the calibration glass plate is located in the center of the view of the reference camera; 2, the positions of a first dot, a second dot, a third dot and a fourth dot on the back face of the calibration glass plate in the coordinate system of the fixed camera are obtained; 3, the position of a fifth dot in the coordinate system of the reference camera is obtained, and the position of the original point of the coordinate system of a chip mounting head in the coordinate system of the chip mounter at the moment is recorded; 4, the position of the circle center of the back face of the calibration glass plate in the coordinate system of the fixed camera is calculated; 5, the position of the center of the calibration glass plate in the coordinate system of the chip mounter is calculated; 6, the offset of the reference camera is obtained. The method is used for the field of the offset of the reference camera.