The Effects of Connector.Water and Soil Conservatlan" (the abbreviation "ECC") is a fact which exists everywhere.Its power source of movement is the difference of potential energy between social middle level line of water and:conservation determined by productive forces and productive latent capac determined by the state of land. water and sot conservation.Its dynamic pros includes five: exploitation，destruction imminent danger. oonstrwcti and recovery.It has three patterns of mov.msnt i . e . "U" shape，"fishook" shy and "cresoent" shape . "ECC" may be used to rationally adjust the strategy water and soil oonservati}on. As presented in this paper. the "cresoent" shape the moat desirable pattern to put into use.