Abstract: This paper used the flume generalized experiment to investigate the formation and development of delta deposition, after the water flow and sediment was transport into the shallow water lake from the inland river. The result showed that the delta deposition's formation and development of delta deposition can be divided into three stages on the change of plane configuration. First stage, the formation and development followed small sand wave, banded sand wave, fan delta deposition and tongue morphogenetic development, without main channel on the surface of the deposition and no string ditch on both sides. Second stage, water flow and sediment went along the surface of deposition's channel moved forward on the left and the right side region alternately. The last stage, water flow and sediment went along the new channel synchronous moved forward. In the longitudinal launching, the initial rate was larger and gradually decreasing affected by the lateral broadening. The second stage, delta deposition moved forward as relative stabilization rate alternate propulsion. The third stage, longitudinal launching rate showed a weakening trend, and finally keeped overall synchronized advance rate. In the vertical deposition, the deposition at a state rate silting up development. In the lateral broadening, water flow and sediment transverse sediment transport because of the influence of river channel mainstream swing.