It is very important that an appropriate grain size is selected to accurately analyze land-use landscape patterns. RS, GIS and the landscape index method was used to explore the proportion of landscape types, landscape index and with grain size change and the area loss, ultimately determined the suitable grain size for analyzing land-use landscape pattern of Caofeidian?new district under two aspects of landscape elements: landscape structure and landscape configuration. The results showed that some landscape indices and grain size could be fitted to a mathematical relationship?(R2＞0.905 4), and determined the appropriate granularity analysis?domain?(30, 50)?and suitable?size 50 m. Land-use landscape type was rich of Caofeidian New District, but no dominant type. The elements distribution were densely and the degree of fragmentation was serious. The?landscape?type distribution?was extremely uneven,?not conducive to the?maintenance of?landscape spatial pattern.