The invention relates to the technical field of karst area friction type cast-in-place piles, in particular to a karst area friction type cast-in-place pile forming quality detection method. The karstarea friction type cast-in-place pile forming quality detection method is characterized in that a vertical detection pore passage is reserved in the center position of a reinforcement cage of a cast-in-place pile; a liftable and rotatable quality detection device is arranged in the detection pore passage and is made to move along the detection pore passage so as to conduct transverse detection onthe pile forming quality of the cast-in-place pile; and the detection pore passage is blocked by pouring a reinforcing body after completion of detection. The karst area friction type cast-in-place pile forming quality detection method has the advantages that the structure is simple; the detection pore passage is in a hollow state all the time in the cast-in-place pile pouring process; the detection pore passage can serve as both a heat dissipation passage for reducing generation of cracks during concrete pouring and a running passage for the quality detection device to facilitate detection on the extensibility of boundary bodies in karst caves and judge the pile forming quality of the cast-in-place pile; and the depth of the quality detection device located in the cast-in-place pile is adjustable.