Swelling of the knee joint after meniscus surgery can be reduced by the following measures: i. Localized knee joint can be reduced by pressure bandaging to reduce bleeding as well as exudation, and knee joint swelling can be reduced by elastic bandage bandaging. The affected limb should be elevated above the heart to promote blood return to the lower limb by gravity and eliminate the swelling of the lower limb. Third, symptomatic treatment can be carried out through medication, including oral Veritin and Mazeline to promote the restoration of venous power, promote the return of blood to the lower extremity and reduce swelling, and also intravenous mannitol to reduce swelling. Fourth, the isometric contraction of the muscles of the lower limbs, that is, the muscles produce the corresponding contraction, but cannot produce the movement of the joints, which is conducive to squeezing the veins, and can also promote the blood return to the lower limbs and reduce swelling. V. Preventive amount of low molecular heparin calcium can be used to reduce the chance of deep vein thrombosis, which is also beneficial to the elimination of swelling.