Chiaogou of Santan is at present one of the urgent top-priority to be controlled in the south section of Chenkun Railway line, Based on the analysis of damages caused by the mudrock flow，the worseninig of geological and geomorphological environment and the developing tendency in santan mudrock flow gully, this Paper suggests two plans for controlling over santan mudrook flow gully:(1)the combination of check- ing and drainage; and (2)the construction of open channel aqueduct, Also, the com- parison of two plans is made in this paper.