Abstract: Based on the achievements of farmland classification, the paper researched on quality evaluation method of supplementary cultivated land on the connection with urban construction land increase and rural construction land decrease. Firstly, it was the quality evaluation program of supplementary cultivated land established, which included the special planning stage, the project planning stage and the cultivated land supplement stage. Secondly, series evaluation methods were established that were used to evaluate the supplementary cultivated land in the different program. Such as adjacent cultivated land and threshold limit value methods established in the special stage could set up the supplementary cultivated land natural attributes and target value method in the project planning which evaluated on the supplementary cultivated land grading. Finally, satisfying results were obtained by the demonstration in the connection project of urban construction land increase and rural construction land decrease in Shenbei district.