With the rapid development of highway and railway construction in mountainous areas in China，the phenomenon of bridge pile foundations built in sloping ground is growing daily，but the bearing mechanism of bridge pile foundations in sloping ground is complex. Therefore，the design and calculation of bridge pile foundations in sloping ground has gradually attracted wide attention and become one of the current research hotspots. In the engi? neering design of bridge pile foundation，the inclined and eccentric load transmitted from the bridge superstructure， the extra earth pressure caused by the pile-slope asymmetry system，and the reduction effect of lateral soil resistance should be considered simultaneously. Based on the comprehensive analysis of related literature at home and abroad， in this paper，the current research status of the bridge pile foundation is elaborated detailedly in four aspects：the bearing mechanism，the field and the model test method，the stress deformation analysis and design method，the construction technology，safety assessment method and strengthening processing measures. Furthermore，future re? search directions in this field are pointed out.