The exploration of biological gas in the Huhe Depression of the Hetao area has become the new domain of searching reserves while the exploration degree of biological gas is relatively low．According to the characteristics of seismic reflection such as amplitude, continuity，interior configurations and exterior shapes, three types of seismic facies are recognized on the seismic reflections of the Pleistocene in this area，including mediumintense amplitude continual paralleling or subparalleling sheet facies，variable amplitude weakcontinuity and medium continuity and paralleling or subparalleling sheet facies，disorderly facies．Furthermore， the distribution map of seismic facies  has been compiled for the Huhe Depression，and the sedimentary facies of wells He 1 and He 5 have been analyzed using the core data．In the end, the seismic facies have been transferred into sedimentary facies，and the results show that the shallow lake，semideep lake and shore lake subfacies were mainly developed in the study area．It is no doubt that this research will have a guiding effect on the exploration of biological gas in this area．