Miyun County located in the North-East of Beijing City. Miyun reservoir in the Miyun County is the major drinking water source of the Beijing residents. Non-point pollution control of Miyun reservoir is the primary task in the Miyun County, in the mean while, agricultural development is also important for the income increase of the local people. This study was seeking to optimize the land-use spatial distribution which is one of the important factors influencing the watershed hydrology. Land-use change scenarios for non-point pollution control adapted to Miyun County were generated. Integrating landscape security pattern analysis with a land-use explicit model based on the 'Source-sink’ theory was chosen as one method. Landscape security pattern is one of the potential spatial patterns in this region. This potential pattern which composed of strategic portions and distributions of the landscape has crucial importance in controlling certain ecological processes. In our case study, landscape security pattern in the Miyun area was focused and analyzed for non-point pollution control of the Miyun reservoir. "Source-sink" theory assumed the land-use can be classified into two types: 'source’ and 'sink’ land types, based on their functions in pollutant transport and detention. The land-use change processes which will potentially contribute to the non-point pollution were identified in the low security area. Next two scenarios were simulated using the CLUE-S model. Scenario one investigates the land-use change based on historical land-use dynamics. Scenario two examines the development obeyed to a negative planning approach, which focus on the conservation of low security area. In the model operation, applied land-use dynamics are identical for both scenarios except for a land-use change restriction within the low security pattern area which will probably increase the non-point pollution. Results for scenario one depict two processes, one is the unused land reclamation by arable land and second a transformation of arable land to orchard. These two processes might have a great potential to contribute to non-point pollution. In scenario two, these two processes were restricted to the low security pattern area. The increased arable land and orchard patterns were transferred to a moderate security pattern area by the model in the simulation process. Probably vegetation recovery within the low security pattern area may enhance as major process the interception of the pollutant of this region. Although the total area of "risk source land" keep unchanged in the study region, the optimization of land-use patterns reduces non-point pollution risks.