Abstract: At present,the potato verticillium wilt in recent years has become a serious impact on the main potato producing areas of one of the important diseases,how effective control of potato verticillium wilt has become an urgent need to solve the problem.Through the separation and screening of highly efficient biocontrol strains,the rational use of biological control means to control the potato verticillium wilt is imminent.The results showed that Trichoderma strain M-17 was a strain with good control effect.The results showed that Trichoderma strain M-17 was a good control strain.The control effect of strain M-17 was 52.14% and 62.14% respectively in the control of field control effect in different areas,and the control effect was higher than that of chemical agent.Therefore,the results of comprehensive indoor and field experiments showed that M-17 was relatively stable,and it was a biocontrol strain with good biocontrol effect.According to the results of molecular biology and morphological classification in the health of potato verticillium wilt has a greater development prospects.