Abstract: This study aimed at studying the relationship between the comprehensive factors of soil fertility and soil enzyme activity in three Ascendens mucronatum planting patterns in the first tier costal area, Nanhui district, Shanghai city. Employing three A. smucronatum planting patterns as experimental objects, including A. mucronatum (A),A.mucronatum+soybean(A+S),A.mucronatum + Ligustrum lucidum + soybean(A+L+S)and beach land(CK), and we conducted a canonical correlation analysis between soil nutrient comprehensive factors(U)and soil enzyme activity comprehensive factors(V), and an improved analytic hierarchy process(AHP)was used to evaluate the soil fertility quality. The result showed that there was a canonical correlationship between factor U and factor V, which caused by available P and total N, urease and invertase activity. The factor U and V values of top soil were higher than bottom soil(except for the U value of CK)in all planting patterns. In the different planting patterns, the values of U were shown as A>CK>A+S>A+L+S, and the values of V were shown as A+L+S>A+S>A>CK. The soil fertility quality index(FQI)were A+L+S(0.86)>A+S(0.76)>A(0.68)> CK(0.30). In addition, the soil pH was the key restriction factor of improving soil fertility. So the planting pattern A+L+S was the best in three patterns.