In plateau ever-frozen ground region with harsh climate and vulnerable ecological environment, various conditions of frozen soil layer bring difficulties to the construction of cast-in-place pile. To be up to the related standard of qualification, safety and environment protection, kinds of calamity initiated by the distortion, intensity weakness, cold expansion and melting breakdown caused by the frozen soil must be managed to prevent and remove. Construction technology of cast-in-place pile used for Buqu River is detailed. It is obviously different from normal technology used in land but effective in plateau ever-frozen ground and it can be referred to construction in similar geological conditions.