Abstract: This paper introduces the high-level blockage emergence in a short time in Xinbaima 1# chute.By judging the type of high-level blockage，the causes for the blockage are elaborated and some dredge disposals are given.Then these disposals are implemented to eventually dredge the blockage.And some attention that should be paid in design and construction of open-pit mine chute and in production are analyzed，and how to prevent the high-level blockage and to dredge the blockage for mine chute are summarized.

Key words: Chute, High-level blockage, Balloon blasting, Dredge