Complex folding-axis lens group optical axis consistency adjustment method

The invention discloses an optical axis consistency adjustment method for a complex folding-axis lens group, and solves the problem that a large amount of chromatic aberration in a camera cannot be eliminated due to the fact that the attitude positioning difficulty of a diffraction primary lens and a diffraction correction lens is large and an adjustment detection light path is difficult to build. The method specifically comprises the following steps: 1, adjusting a main structural plate mounting surface to be horizontal; step 2, transferring the cross-center reference of the diffraction primary mirror to the cross-center reference A on the main structural plate through the secondary mirror and the third mirror; 3, determining postures of a fourth mirror, a fifth mirror and a sixth mirror through the center penetrating reference A; step 4, positioning the front correction mirror on the mounting surface of the main structural plate; and step 5, through detecting the postures of the correction mirror, the turni