Abstract: According to the calculating results from the Ministry of Land and Resources, the theoretical increase potential of cultivated land is 48 million hectares via rural residential land consolidation in 2020. However, because of restraint factors like natural conditions, economic development, land use plan, there is discrepancy between the actual and theoretical goals. So it is important to calculate the cultivated land increase potential accurately pre- and during rural residential land consolidation planning. In view of the current calculating methods such as simple arithmetic and measuring results deviated from the process of per capita construction land use standard method. After analyzing and summarizing previous calculation methods, this paper, taking Pinggu District of Beijing as a case, establishes a filtering correction mathematical model, in consideration of account natural suitability, ecological security, economic feasibility, social acceptability and planning guidance. In order to correct the realistic potential of land consolidation in rural residential areas, the correction coefficient of realistic potential were refined by the theory and method of agricultural land gradation, "one-vote negative system" of ecological land, index and method of economic-social evaluation and conceptual assignment method. The results show that, the natural limiting correction coefficient of rural land consolidation potential in Pinggu District is 0.4757~ 0.8628, the ecological limiting correction coefficient is 0.3004~0.8852, the economic limiting correction coefficient is 0.3943~0.8939, the social limiting correction coefficient is 0.4643~ 0.8165, and the plan-oriented limiting correction coefficient is 0.2877~0.8858. Effects of ecological security and plan guidance factors on rural residential consolidation potential and its regional difference are more remarkable than those of the other three factors. By multiplying the five above correction coefficients, the net cultivated land increase potential via rural residential consolidation is 614.13 hm² and the coefficient of cultivated land increase potential is 10.77%. This study sets up a more mature and logical evaluation index system for rural residential land consolidation, which can improve the methods of regional rural residential land consolidation plans.

Key words: rural residential land consolidation, cultivated land increase potential, integrated correction, calculation, Pinggu District, Beijing