With the rapid development of science technology and biotechnology ,the research of powdery mildew resistant research in flax has become a hotspot .In order to explore the future research direction of flax powdery mildew ,the research progress in pathogen of flax powdery mildew ,occurring and development ,comprehensive control ,genetic development and resistant gene location in flax were summarized ,and some personal opinions a‐bout powdery mildew resistant research were put forward .