According to the problem about different satellite remote sensing products lacking consistency benchmark in different regions,four methods were presented including category composition similarity,category confusion degree,spatial consistency and reference degree analysis,and different land cover consistency between products were comparatively analyzed.In view of land cover spatial structure and change in South America has important significance for global change research,this paper used the above four methods to study the consistency of five kinds of global land cover products in South America.The results showed that the land cover products have similar descriptions about the construction of South American land cover,and have the highest consistency of woodland identification;there are 60% land area in South America owing a relative high consistency;the reference precision between different land cover products ranges from 42.27% to 87.59%.The group of GLOBCOVER2009/GLOBCOVER2005has the highest reference precisions,which refers the error caused by land change is largely smaller than the error caused by the interpretation process due to different institutions,sensors,land classification systems,and interpretation methods.