The invention provides a cast-in place pile reinforcing cage mounting and positioning method and an auxiliary device used for the cast-in place pile reinforcing cage mounting and positioning method. According to the cast-in place pile reinforcing cage mounting and positioning method, a positioning clamp frame is used for supporting, positioning and fixing a cast-in place pile reinforcing cage in acast-in place pile guide pipe. The positioning clamp frame is composed of a first fixed casing pipe, a second fixed casing pipe, two supporting rods, a middle casing pipe, a pipe body, an extension pipe, a fixing clamp bolt and a wheel, wherein the middle casing pipe is arranged at the rear end of the pipe body, the rear end of the extension pipe is inserted into the front end of the pipe body, the fixing clamp bolt is inserted into a fixing hole and a corresponding adjustment hole to fix the rear portion of the extension pipe in the pipe body, and the other ends of the two supporting rods obliquely extend outwards and are correspondingly connected with the first fixed casing pipe and the second fixed casing pipe. The cast-in place pile reinforcing cage mounting and positioning method andthe auxiliary device used for the cast-in place pile reinforcing cage mounting and positioning method have the advantages that the cost is low, operation is easy, labor and time are saved, the applicability is high, the mounting and positioning quality and speed of the cast-in place pile reinforcing cage are improved, the construction efficiency is improved, the construction period is shortened,and the using effect is good.