Abstract: A weighted fuzzy logic reasoning model is proposed,which is effectively used to describe the fuzzy logical relations among “weighted logic And, Or and unification” which generally exist in the field of uncertainty problem solving.In addition,this model has been applied in National “863” Advanced Technology Projects “Jilin Province Central Region Corn Production Intelligent Information Technology Application and Demonstration Project”,and has achieved more satisfactory results.At the same time,it is pointed out that further research work should be done on the relations among these three weighted fuzzy logics,the truth value calculation methods related to these three logic operations,the relations among those methods,etc..