The utility model belongs to manual hole digging pile's construction field, for under solving the water -rich stratum geological conditions, manual hole digging pile pass through sand bed, silty fine sand geological construction in -process gush sand, burst sand, the hole of collapsing, perpendicularity control scheduling problem, provide a manual hole digging pile construction is with self - leveling back pressure device, adopt self - leveling back pressure device and bound water leveling ruler identification steel to protect a section of thick bamboo during construction and insert the state, utilize jack back pressure steel to protect a section of thick bamboo. Utilize next -door neighbour's existing railway operation circuit operation place is limited, the activity duration is limited problem can be solved to the back pressure method, and the steel protects the perpendicularity control difficult problem of a section of thick bamboo, reduces the input in main equipment and large tracts of land operation place, simultaneously can in good time dynamic adjustment steel protects the straightness that hangs down of a section of thick bamboo, and it is effectual to be under construction.