Land suitability evaluation is the base for Iand use planning and land management to enhance the sustainable LL"'>c or land resources. Suitability evaluntion for tcf maize and grass pea cultivation in r:.iinfed agriculture was studied through a qualitative process of matching land characteristics with crops requirements based on maximum llmirarion system. The present study ..,\~s initiated with the main objectives of creating the digital elevation model, • idc"tifying and mapping the major soils and LlJLC, classifying the watershed into land mapping units, and finaJJy producing suitability maps of the selected crops. whic'i are c!rlfvated in the Debre Mcwi watershed in the Amhara Regio'1. The mojor variables used in lhis study include topography, climate, soil and LUL<..', L>a~t ol spatial vector ard raster as topographic $h~et, field observation and laboratory results. Arclnfo GIS 9.2 version was well as the attribute of the major variables were collected from QuickIJird2 satellite imagery, intensively used through th~ study. \1ost of the land units of the study area were lound to be moderntely suitable for rd: Che low tying land units highly suitable for grass pea and the well drained Janel units were moderately (O marginally suitable for maize cultivation at a lo\ .. · level in':')111 use. While doing easily update and enables 'to produce various. types of n1ap~ und i:ifonnation about the Dobre all these, the GIS-c'arabasc was established and set in with a variety of datasets that can be Mewi watershed. Thus, the study It"' -hnwed GIS and ns techniques are powerful tools ro use planning, decision making and resource management. integrate various data layers and to as:;c!\:-t lhi:: po1.en1.i:.:Js of land resources for scient.fic land