The fine component greatly influences the flow characteristics in the viscous debris flow occurred in the China. In this study, the debris flow composed of coarse particles and sluny (water and clay) was generated in laboratory experiments. It is found that the front of debris flow flows intermlittently by the jamming of sediment particles and subsequent failure and remobilization of the jammed particle even in the case that the viscosity of interstitial liquid is 80 times larger than that of water. The viscosity of interstitial liquid decreases the percolation through accumulated layer in the flowing stage. As the results, the transportation capacity of coarse particles decreases and the flow depth decreases.