An emotional analysis method based on LDA thematic model and intuitionistic fuzzy TOPSIS for agricultural product online reviews was proposed. The method uses the affective dictionary to analyze the emotional tendency of online comments and calculate the positive emotional value of agricultural products. The LDA thematic model is used to calculate the weight of each attribute， and the comprehensive evaluation value of agricultural products is calculated with the intuitive fuzzy TOPSIS method. SPSS statistical analysis software was used to verify the validity. The results show that the comprehensive evaluation value has a significant positive correlation with monthly sales volume and positive emotional value， which indicates that the method is reasonable and provides a new idea for mining emotional information in the online evaluation of agricultural products.