Angle-adjustable bolster used after posterior cruciate ligament reconstruction

The utility model discloses an angle-adjustable bolster used after posterior cruciate ligament reconstruction. The first bolster, the second bolster and the third bolster are sequentially arranged from left to right; a patient can adjust the knee joint flexion angle according to recovery requirements, compared with a common soft pillow, the knee joint flexion angle can be quantified, the operationeffect and the recovery treatment effect are guaranteed, but the size is large, and carrying and storage are inconvenient. Therefore, the technical scheme is further optimized, a cavity with an opening in one end is formed in the first bolster and used for storing the second bolster, similarly, a third bolster is detachably connected into the second bolster, and at the moment, storage is convenient, but consumables are large, and the cost is high; therefore, the technical scheme is further optimized, the first bolster, the second bolster and the third bolster are each designed to be in a U shape with a downward openi