The invention relates to a telescopic rotating stop device, which is characterized in that an inwards concave structure is arranged on a seat plate, a first round through hole is formed in the inwards concave structure, a baffle edge in a guide tube is fixedly connected with one end of a cylindrical body, the center of the baffle edge is provided with a second round through hole, the center of a press plate is provided with a square groove, the center of the bottom surface of the groove is provided with a third round through hole, the opposite end to the end, connected with the baffle edge, of the cylindrical body passes out of the first round through hole, the baffle edge is arranged in the groove in a clamping way, the seat plate is fixedly connected with the press plate, the large-shaft-diameter end of a guide post is positioned at one end, far away from the baffle edge, in the cylindrical body, the small-shaft-diameter end of the guide post passes through the second and third round through holes and is then fixedly connected with a baffle plate, a longitudinal chute is formed in the inner wall of the cylindrical body along the axial direction, a transverse chute is formed in a position, near the baffle edge, in the cylindrical body, the initial end of the transverse chute is communicated with the longitudinal chute, a slide pin is arranged on the side wall of the large-shaft-diameter end of the guide post, a spring is arranged on the guide post in a sleeving way, one end of the spring is fixedly arranged on the large-shaft-diameter end of the guide post, and the other end of the spring is fixedly arranged in the groove.