Pear powdery mildew, caused by Phyllactinia pyri, is one of the most important diseases in pear production. This disease mainly harms the back of the pear leaves, seriously affects the photosynthesis and transpiration, and leads to the decrease of the yield. Breeding of the resistant varieties to powdery mildew is the most effective and fundamental measure to control powdery mildew on pear trees, and it is also one of the targets of pear disease resistance breeding. However, there are few research on inheritance of powdery mildew resistance in pear tree, andmolecular markers and genes of resistance have been not discovered. In this study, the powdery mildew incidence data of 306 individuals of 'Jinfong × Zhongli 1' F1 generation were collected from 2019 to 2021, and the susceptibility index and incidence were calculated to evaluate the resistance of each individual to powdery mildew. The data will lay the foundation for analyzing the genetic rules of powdery mildew resistance, screening molecular markers of powdery mildew resistance and locating resistance genes in the future, and provide data support for pear hybrid combination selection and breeding of powdery mildew resistant varieties.