To explore the effect of returning discarded and crushed pear tree branches to the field and make discarded branches get resourceful use, we conducted a trial of pear tree branches crushing and mulching to return to the field from the year of 2017 to 2018 with ‘Jinmi’ pear (Pyrus pyrifolia Nakai‘Jinmi’) as the object. This experiment was carried out with four treatments: no discarded branches return (0 kg·plant^-1, CK), low volume of discarded branches return (4 kg·plant^-1, T₁), conventional volume of discarded branches return (8 kg·plant^-1, T₂) and high volume of discarded branches return (12 kg·plant^-1, T₃), then their effects on soil mineral element content, soil microbial content, soil enzyme activities, pear newborn branch growth condition, pear leaf growth condition and pear fruit quality in pear orchard were discussed. The results were shown as follows: (1) about mineral elements in soil: under T₂ treatment, the contents of organic matter (OM), total manganese (Mn), total iron (Fe), total copper (Cu), total zinc (Zn), total boron (B), total calcium (Ca), total magnesium (Mg), total sulfur(S), total nitrogen (TN), nitrate nitrogen, available potassium (AK) and available phosphorus (AP) in soil returned notably increased, and the Pear Orchards pH value markedly increased, improving the soil acidification. However, T₃ treatment significantly decreased the total manganese, total zinc, and nitrate nitrogen contents in the soil. T₁ treatment also significantly reduced the total sulfur, total phosphorus and available phosphorus contents in the soil. (2) About the soil microbes and soil enzyme activity: T₂ treatment significantly increased the number of soil fungi and actinomycetes in the pear orchard, and at the same time significantly increased the activity of soil catalase; Although T₃ treatment significantly decreased the activity of soil peroxidase, it significantly increased the number of bacteria in the soil. (3) About pear tree growth: the diameter of the new branches of pear trees increased significantly under the T₁ treatment. However, no matter under which treatment, the leaf thickness, leaf weight, chlorophyll content and carotenoid content of the pear trees did not change apparently. (4) About pear fruit quality: T₂ treatment significantly increased the pear fruit weight, vertical and horizontal length, Vc content, and fruit hardness, but the titratable acid content of the pears decreased significantly, which promoted a significant improvement in fruit quality. The above conclusions show us that returning the appropriate amount of pear branches crushed and mulched in winter can significantly improve the soil mineral element content and organic matter content, effectively improve soil acidification, increase the number of soil fungi and actinomycetes and their related soil enzyme activities, promote the growth of new branches and improve fruit quality. In conclusion, under this experimental conditions, the best amount of branches returned to the field for the purpose of improving the comprehensive properties of soil properties in a short time was 8 kg·plant^-1.