Abstract: The climate features of southern area in China is characterized by high-temperature, high humidity and rainy, thereby bring many difficulties to the production of silage maize and leading to the higher corruption rate and poor quality. Since 2007, the effects of silage maize of the 12 cattle farms had been surveyed in Guangdong and Guangxi Provinces. The corruption rates vary form 10 % to 20 % and the losses of silage maize were more serious. Through analysis we found that the corruption of raw materials had much to do with freshness, water content, production process and the management. According to the causes of higher corruption rates in the South, the comprehensive measures including microbial fermentation technology was used to improve the quality of silage maize in the Southern Regions. The results showed that through using these methods, the corruption rate of silage maize was decreased obviously, while the crude protein content was increased to a certain degree and the quality of silage maize was greatly enhanced.