Abstract: Rice blast, caused by Magnaporthe oryzae, is one of the most devastating global diseases threatening rice production. The development and deployment of resistant cultivars are widely regarded as the most economical and environmentally sustainable strategy for disease control. Currently, rice resistance breeding relies heavily on a limited set of known resistance genes and the genetic pool of cultivated rice (Oryza sativa). However, with the continuous evolution of pathogen populations, many existing resistances are being overcome, highlighting the urgent need to address the narrowing genetic base of resistance. Wild rice, the progenitor of cultivated rice, has accumulated extensive genetic diversity through long-term natural selection and is considered an invaluable reservoir for discovering novel resistance genes. Currently, large-scale evaluation of rice blast resistance in wild rice accessions from international sources, such as Myanmar and Sri Lanka, is relatively limited. In this study, 155 wild rice accessions from domestic and international sources were used as the main research materials,and the detached leaf puncture method was adopted to compare the resistance performance of wild rice from different sources against 16 physiological mixed races of Magnaporthe oryzae from Sichuan Province,thereby screening potential excellent disease-resistant germplasms. The results revealed significant differentiation in resistance among the tested materials: 103 accessions were classified as resistant (R+MR), accounting for 66.4% of the total. Specifically, 76 accessions (49%) exhibited high resistance (R), while 27 (17.4%) were moderately resistant (MR). The proportion of R-grade accessions from Myanmar (57.7%) and Sri Lanka(55.6%) was slightly higher than that of Chinese accessions (42.9%), with the resistance rate of Oryza nivara from Sri Lanka reaching as high as 90%. In conclusion, wild rice originating from Myanmar and Sri Lanka demonstrated higher resistance frequencies and lower susceptibility under the conditions of this study. These accessions serve as priority candidates for subsequent broad-spectrum resistance gene mining and as donors for resistance improvement in rice breeding.