The invention relates to a bauxite grinding technology, especially to a new dry-wet mixed grinding technology of bauxite, and belongs to the field of alumina production technology. A ball mill or a rod mill is used as wet-grinding equipment, ore pulp obtained after grinding undergoes classification through a hydroclone, returned sand coming out from the hydroclone is ground again, and an overflow coming out from the hydroclone enters a qualified pulp agitation tank; a vertical mill is used as dry grinding equipment, bauxite with qualified granularity obtained after intermediate crushing enters the vertical mill, and the ground bauxite is blown back through hot air from bottom to top into a powder concentrator; after classified through the powder concentrator, coarse granular bauxite returns to the vertical mill to be ground again, and fine granular bauxite is collected through a dust collector and then enters the qualified pulp agitation tank; and the wet-ground ore pulp and the dry-ground dry powder are stirred and mixed in the qualified pulp agitation tank so as to finally obtain qualified ore pulp. According to the invention, solid content of qualified ore pulp is effectively raised, and number of predesilicification tanks is greatly minimized. In addition, granularity of qualified ore pulp can be effectively controlled, and red-mud settlement difficulty caused by too fine granularity is avoided.