Cast-in-place pile coring auxiliary device

The utility model relates to the technical field of foundation pile construction quality detection, and provides a cast-in-place pile coring auxiliary device which comprises an inner sleeve, an outer sleeve, a limiting piece and a fixing assembly. The inner sleeve and the outer sleeve are coaxially arranged, one end of the inner sleeve is used for being vertically inserted into a cast-in-place pile, and the inner sleeve is used for providing a channel for coring operation; the outer sleeve is fixed to the cast-in-place pile through the fixing assembly. The limiting piece is arranged at the end away from the cast-in-place pile and clamped between the outer wall of the inner sleeve and the inner wall of the outer sleeve. According to the auxiliary coring device for the cast-in-place pile, the outer sleeve is fixed to the cast-in-place pile, the limiting piece is clamped between the outer wall of the inner sleeve and the inner wall of the outer sleeve, when a drill rod conducts drilling and coring operation alon