The invention relates to a spine arching waist and lumbar disc posterior protrusion jacking and load-bearing posture correction brace which comprises a superomarginal plate, a spine plate, a lumbar vertebra plate, waistbands, a bellyband and shoulder straps, a pasting fastener is arranged in the middle of the superomarginal plate which is provided with the shoulder straps and the bellyband, a pasting fastener is arranged in the middle of the lumbar vertebra plate, the waistbands are arranged on band bolts at two ends, the inner end face of the spine plate is an arching face, a pasting fasteneris arranged at the upper end of the spine plate to be connected with the superomarginal plate, and an assistant band is arranged at a position, close to the middle, of the outer end of the spine plate. An arching waist is abutted through the arching face of the spine plate, the bellyband maintains an upper abdomen, the waistbands maintain a lower abdomen, a resultant force is formed at a front-rear buckling face peak of the upper body to promote the arching waist to forwards protrude, and jacking support force of the spine plate is enhanced through the assistant band, so that posture correction practicability is improved greatly; for lumbar disc posterior protrusion and lumbar muscle strain, the lumbar vertebra plate can be used for jacking intervention load-bearing waist protection balance.