Mounting and positioning device for cast-in-situ bored pile reinforcement cage

The utility model discloses a cast-in-situ bored pile reinforcement cage installing and positioning device which comprises an installing mechanism, a positioning mechanism and an auxiliary supporting mechanism, the installing mechanism is used for being connected with a cast-in-situ bored pile reinforcement cage and comprises a circular hoop which is attached to the reinforcement cage and fixedly installed in the circumference direction of the reinforcement cage in a diameter-adjustable mode, the positioning mechanism comprises a telescopic sleeve, a sleeving block which is fixedly connected with the telescopic sleeve and is used for sleeving the fixed circular hoop, and a roller which is fixedly mounted at one end, far away from the sleeving block, of the telescopic sleeve and is attached to the inner wall of the cast-in-situ bored pile steel casing; the auxiliary supporting mechanism comprises two supporting rods which are symmetrically installed on the two sides of the telescopic sleeve in the inclined dir