This paper introduces Professor Wang Longhui’s clinical experience in the treatment of ovarian endometriosis cyst by CAI’s method of internal heterotrophic kidney. The internal knot of stasis is the basic pathogenesis, kidney deficiency is the important link,and dampness,turbidity and poison are the pathological products. The treatment mainly includes activating blood circulation,removing blood stasis and eliminating phlegm and eliminating“blood from meridian”. At the same time, combined with the kidney regulation method, the treatment of time, menstrual treatment to remove blood stasis and pain,alleviate dysmenorrhea; After the later period of nurturing kidney xiaojian, removing stasis and dispersing knot, shrink cyst; Intermeridian period, prophase nurtures kidney and helps Yang, promotes the dissipation of remaining blood turbidite. Clinical attention to protect the spleen and stomach, calm heart soothing liver, Chinese and Western mutual ginseng, improve the curative effect.