Sediment scouring experiments are conducted for upstream，downstream，laterally inclined and vertical circular piles under constant water flow conditions. The empirical equation of scour depth-time is used to fit the equilibrium scour depth，then the maximum scouring depth of piles with different inclined directions，the development of scouring deposition and the final distribution of scouring and depositing patterns are studied. The experiment results show that：1）The lateral scouring range of the inclined pile is smaller. Compared with the vertical pile，the maximum scouring depth of the downstream inclined pile reduces 16.89%，and the depositing length after the pile is shortened. 2）The maximum scouring of the lateral inclined pile is located in the inclined direction，and its depth increases 6.92%. The scouring and depositing shape develops to the inclined side，and the depositing area behind the pile is narrow and long. 3）The maximum scouring depth of the upstream inclined circular pile increases 15.62%，and the scouring area develops upstream with the highest post-pile depositing height and the longest longitudinal scouring length.