The invention discloses a method for recycling high-grade rare and precious metals from waste magnesium-chrome bricks of a Kaldor converter, and belongs to the field of comprehensive utilization of secondary resources. The problems that a traditional waste magnesium-chrome brick treatment method is low in metal recycling rate and pollutes the environment are solved. The method comprises the following steps that the waste magnesium-chrome bricks are levigated by adding water, the ore pulp concentration is adjusted, an adjusting agent sodium hexametaphosphate is added to be stirred, a collectingagent is added to be stirred, and flotation is conducted; water is added into rough concentration ore concentrate to adjust the ore pulp concentration, the adjusting agent sodium hexametaphosphate isadded to be stirred, and flotation is conducted; water is added into primary selection ore concentrate to adjust the ore pulp concentration, and secondary selection and floatation are conducted; andwater is added into secondary selection ore concentrate to adjust the ore pulp concentration, three-time selection and floatation are conducted, and rare and precious metal ore concentrate is obtained. According to the method, the problems that the secondary resources of the waste magnesium-chrome bricks of the Kaldor converter have no good treatment technology currently and occupy the field to bepiled can be effectively solved, few dressing equipment variety is needed, the equipment investment is low, operation and maintenance are easy, and the running cost is low.