Eight townships in the south of Jiangxia District of wuhan city are traditional planting areas of Cunninghamia lanceolata ，and the occurrence of diseases and pests of C. lanceolata is serious . Through systematic investigation，it is found that there are18main insectpests of C. lanceolata，among which odontotermes formosanus and phloeosinus are the most serious . There are8main diseases，among which Colletotrichum gloeosporioides and physiological yellowing of C. lanceola- ta are serious . Based on the results，the mechanism of diseases and pests causing the growth decline of C. lanceolata forest was analyzed，and the ecological control countermeasures for the main diseases and pests of C. lanceolata forest were put forward.