[目的]为高粱链格叶斑病的防治提供依据。[方法]对高粱叶片上的一种叶斑病进行了病原菌的分离与鉴定。[结果]病原菌在PDA平板上生产迅速,菌丝边缘白色,中央灰绿色;分生孢子串联成链状,褐色,近圆柱状或倒棍棒状,有横隔膜2~7个,纵隔膜0~4个,鉴定其为链格孢属(Alternaria)真菌。[结论]该病在高粱叶片上发病严重,应对其侵染治病过程以及致病机制进行进一步研究。 [Objective] The research aimed to provide the basis for the prevention and control of sorghic leaf spot leaf spot disease. [Method] The pathogen was isolated and identified from leaf spot on sorghum. [Result] The pathogen was rapidly produced on the PDA plate, the edge of mycelium was white, and the center was gray-green. The conidia were linked in chain, brown, nearly cylindrical or inverted rod. There were 2 to 7 diaphragms and 0 to 4 Which was identified as Alternaria fungi. [Conclusion] The disease was severely morbid on sorghum leaves, and should be further studied on the pathogenesis and pathogenesis of infection.