Abstract: Evaluation of ecological quality of cultivated land and analysis of its influence factors would be helpful for the sustainable utilization of cultivated land. In the present study， Xinzheng City in Henan Province was chosen as the study area， and an evaluation index system for cultivated land quality including 13 evaluation indices was constructed from the perspectives of natural resources， ecological stress and ecological benefits. The ecological quality of cultivated land in Xinzheng City was evaluated by entropy\|weighting TOPSIS method and GIS spatial analysis， and dominating factors influencing the ecological quality of cultivated land were explored via obstacle degree model. It was shown that the overall ecological quality of cultivated land in Xinzheng City was good. The cultivated land in the east， southwest and northwest of Xinzheng City exhibited a higher ecological quality， while that in the south and north around city showed a lower ecological quality. Proportions of 1st， 2nd， 3rd， 4th and 5th class cultivated land were 2544%， 4194%， 815%， 933% and 1514%， respectively. The dominating factors of the ecological quality of cultivated land in Xinzheng City were the forest network proportion， per capita grain yield， synthetic index of soil pollution， soil organic matter content and thickness of soil layer.

Key words: ecological quality of cultivated land, entropy weight, TOPSIS, obstacle degree, GIS