[Objective]The paper was to understand the biological characteristics of Trabala vishnou Lefebure. [Method]Using the combination methods of field survey, caged observation in forest and indoor rearing observation, the morphological characteristics, biological characteristics and natural enemies of T. vishnou in Qinzhou Kangxiling Mangrove Natural Reserve in Guangxi Province were investigated.[Result]T. vishnou occurred for 4- 5 generations each year in Qinzhou Mangrove Nature Reserve of Guangxi, the developmental duration of each generation averagely was 57.64 d. The pest survived the winter as eggs, mature larvae or pupae, and the overwintering eggs, mature larvae and pupae began to occur in December.[Conclusion]The study provided a scientific theoretical foundation for the prediction and control of T. vishnou. [Objective] The paper was to understand the biological characteristics of Trabala vishnou Lefebure. [Method] Using the combination methods of field survey, caged observation in forest and indoor rearing observation, the morphological characteristics, biological characteristics and natural enemies of T. vishnou in Qinzhou Kangxiling Mangrove Natural Reserve in Guangxi Province were investigated. [Result] T. vishnou occurred for 4- 5 generations each year in Qinzhou Mangrove Nature Reserve of Guangxi, the developmental duration of each generation averagely was 57.64 days. The pest survived the winter as eggs, mature larvae or pupae, and the overwintering eggs, mature larvae and pupae began to occur in December. [Conclusion] The study provided a historical data for the prediction and control of T. vishnou.