Though abundant climate resources are favor to the development of banana production, banana suffers magnitude lose for cool injury, even in southwest where is the warmest area in Guangdong. The effect of cool injury on banana are analyzed. The cool injury, which severely impact on banana growth, happened every 5 years normally in Guangdong, but cool injury comes frequently during the 90's of last century. Because of more economic benefit, the plant area of counter season banana expands quickly, and the bud bursting or differentiation is in winter, the potential fatalness of meeting cool injury is increased, and resulted in more impact on banana yield. So the banana planting should be think much of cool injury, wind damage and risk of market, and the situation of site and time in Guangdong, and do well on avoid and mitigation disaster.