Analysis of the economic benefits of land consolidation is an important content of land consolida-tion. With an attempt to apply extension theory and method to land arrangement project

the models of clas-sical field matter element

controlled filed matter element and evaluation matter element are constructed for the economic benefits of land consolidation.The incidence function model is also established using the exten-sion method of distance. A comprehensive correlation degree model for evaluation index and standard grade is then established based on the simple correlation function calculation of index weights. Finally

weighted pro-cessing is adopted for the correlation values and a series of weighted correlation values are obtained. The weighted correlation values are normalized to get average correlation values. When the method is applied to the actual project

the grade for the calculated economic benefits is 2.204

being in a "good" level. The re-search proves the scientific and practical nature of the evaluation model for land arrangement project benefits based on the theory and method of extenics and provides a new approach to the quantitative evaluation of land consolidation economic benefits with a good result.