Abstract: It is very important to screen resistance resources to rose powdery mildew for screening cultivation varieties and resistance breeding in rose. In this study, 349 rose cultivars were screened, which were derived from different regions and types. All the rose resources were classified into 5 levels including high disease resistant, disease resistant, middle disease resistant, susceptible and highly susceptible according to the survey. The results indicated that the resistance to rose powdery mildew was diversified. 182 accessions of rose resources were disease resistant, accounting for 52.15% , and other 167 accessions were susceptible, accounting for 47.85%. In addition, 13 accessions showed high resistance (3.72%). 27 accessions of all the 349 rose resources were from China ancient rose varieties, of which 11 showed disease resistance, accounting for 40.74% of the varieties. Screening of resistance to powdery mildew in rose resources could provide a foundation for the cultivation and variety breeding of rose.