Abstract: In order to effectively control the water inflow during the excavation of the open channel of the inclined shaft with thick alluvium with water content, the collapse of the side slope and the inclined slope is prevented, Combine the foundation ditch dewatering principle, through theoretical calculation and analysis, determine the open channel excavation tube flow, depth and layout.The tube well dewatering is adopted to lower water level elevation of thick alluvium, in order to the water level lower than the trough bottom excavation, reduce water gushing water and soil trough excavation, improve the stability of the soil, so that the soil consolidation, to prevent the work surface collapse, Which laid the foundation for the smooth and safe construction of the open channel of inclined shaft, and provided the reference for the construction of the wellbore under similar conditions.