Irrational land usage has made different environmental problems and using land use planning we want to find best land usage patterns for different land use. In this thesis by surviving experts and stockholders, land use history in Plasjan sub-basin and its important roles in Gavkhooni basin, land use planning objects which involve economic and social welfare, inside habitat conservation and increasing in amount of water producing were determined. Land use and their criteria which prepare study goals were determined as: conservation, rangeland management, forestry, drainage agriculture, rain-fed agriculture, urban and industry growing and ecotourism activities. After criteria standardization and weighting applying AHP and Fuzzy-AHP methods, they were combined together with Multi Criteria Evaluation (MCE) models (OWA and WLC) with medium risk and trade-off 0.5 and 1, repeatedly. Results have shown because WLC has highest possible trade-off, it considers more area with high and very high capability in comparison with designed OWA with medium trade-off. Also Fuzzy-AHP weighting results leads to correlated results with thesis aims. Land use planning was done using proper land use capability models applying Multi Objective Land Allocation (MOLA). By considering study objects, OWA model for drainage agriculture, rain-fed agriculture, urban and industry growing and WLC for conservation, rangeland management and forestry were consider as input in MOLA. At first proper weight and area were determined for each land use and then land use capability maps were combined in MOLA and land use planning map was produced by considering the most capabilities and nearby to decision line. Conservation land use with 0.28 and industry land use with 0.04 have highest and lowest weight repeatedly. In MOLA model, 83 percent of area considered for conservation, rangeland management and forestry and 17 percent was considered for other human land use. So by considering importance of interior functions and structures conservation in Plasjan sub-basin and roles of rangelands and forest, 83 percent of was considered for conserving of functions and structures of this sub-basin.by attention to high ecotourism potential in this area instead of unsuitable land usage, this land use was considered as one of the income source for native people and overlaid on other land use as multi land usage. MOLA result was optimized applying Genetic Algorithm using land use capabilities models, land use weight and proper area and connectivity function in Chadegan region. Land use planning map which produced using GA-MOLA was optimized as landscape indices which connectivity index increased from 99.70 to 99.75 and patch number decrease from 9044 to 2673 that these have positive effect on land use management especially in areas that were considered for conserving. By considering importance of conservation area in Plasjan sub-basin, determined conservation area patches with area more than 1000 hectares, were selected and then by attention to new criteria were prioritized using TOPSIS and Fuzzy-TOPSIS methods. Results of this study have shown that MCDM has high capabilities for land use planning and could produce accurate land use allocation maps in Plasjan sub-basin with complexity, different stakeholders, with determining criteria and surviving experts and stakeholder’s idea.