Compared with no pruning to ‘Nanguoli’ pear in Anshan of Liaoning province,the effects of gentle and heavy pruning on tree growth and fruit quality of ‘Nanguoli’ pear had been determined.The results showed that heavy pruning decreased trunks diameter,tree tallness,crown diameter,amount of long branches,medium branches,short branches and flower buds,but it promoted the development of prolong branches,and it increased nitrogen,potassium and calcium contents in branches,leaves and branches and phosphorus content in branches and leaves.Heavy pruning significantly increased fruit weight,fruit transverse diameter,fruit vitamin C and total acid contents.