Abstract: Objective To review the experience of treatment for mitral insufficiency caused by posterior valve prolapse in 25 patients. Methods A total of 25 cases of mitral insufficiency was enrolled in this study. Peoperative color Doppler echocardiography showed posterior mitral valve prolapse or partial chordae tendineae rupture in all the patients. After the posterior mitral valve prolapse was reconstructed, the mitral annulus was fixed by Sorin soft ring. The effect of mitral valvuloplasty was examined by water injection test and transesophageal echocardiography (TEE). Mitral valve closure and diastolic diameter of left atrium and left ventricle were reviewed after 3 months follow-up. Results There were no deaths in the whole group. Follow-up of 3 months after operation revealed no reoperation. Preoperative severe mitral insufficiency was seen in 19 cases and moderate mitral insufficiency in 6 cases. Immediate TEE examination after surgery showed mitral micro-regurgitation or no regurgitation in 21 cases and minor regurgitation in 4 cases. Three months after operation, echocardiography showed that the left atrial diameter (LAD) and left ventricular end-diastolic diameter (LVEDD) were significantly improved (P<0.05). Conclusions Wedge or rectangular resection of posterior mitral leaflet and the use of Solin soft ring in the treatment of mitral insufficiency have good short-term and medium-term results, but the long-term results still need to be observed.