Abstract: In order to explore the invasion risk and synthetic resistance of diseases and insect pests among main rice varieties, a resistance evaluation of 11 rice varieties was tested by using methods of natural inducing in field. The results showed that the resistances of these rice varieties to main diseases and insect pests were sorted from high to low like the following:‘Yongyou No.538’,‘Yongyou No.12’,‘Xiushui 134’,‘Yongyou No.15’,‘Zheyou No.18’,‘Feng two Yuka No.1’,‘Yongyou No.8’,‘Yongyou No.9’,‘Zhongzheyou No.1’, ‘Zhongzheyou No.8’,‘Tianyouhuazhan’. Among these varieties, the first four ones are high resistance, the next five ones for middle resistance and the remaining two varieties for high and middle sensibility respectively. The evaluation results of rice resistance were identical in the two tested field to main diseases and insect pests, and slightly difference to sporadic ones. By using the method of Multiple Goal Decision for target analysis and making corresponding conversion, the evaluations of synthetic resistances were in good agreement between the two tested fields. Via the analysis to the genetic relationship, it was found that the rice varieties with closer male parents had more similar resistance. We made integrated control strategy according to the analysis of variety characteristics and resistance changes, which would provide evidence for monitoring, early warning and management of diseases and insect pests under different varieties distribution.