According to the mechanical characteristics of earth-retaining wall in this paper mechanical models of three kinds of structures of earth retaining wall: cantilever type,single point support type and multi-points support type are introduced as well as calculation methods.

The approach is established to calculate the displacement of the anchor pre-tensioned point and the top end of the retaining pile taking into consideration the bending deformation and rigid displacement of single fulcrum pile_anchor retaining structure.

Borehole cast-in-place concrete pile cantilever retaining structure and single-pivot mixed retaining structure are usually deep-foundation retaining structures.

Through strduing a vast amount of practices for supporting roadway in soft rock this paper introduces supporting feafure of roadway in soft rock,development and present situation of supporting rockway in soft rock in our country it raises safety supporting counfermeasure of roadway in soft rock and some problems.