Pre-embedded sleeve positioning and plugging device

The utility model discloses an embedded casing pipe positioning and plugging device which comprises plugging pieces, a movable sleeve and an outer cylinder, one end portion of the movable sleeve is movably embedded in one end portion of the outer cylinder, the other end portion of the movable sleeve and the other end portion of the outer cylinder are respectively, symmetrically and fixedly provided with the plugging pieces, gaps in the two ends of an embedded casing pipe are plugged, and the plugging pieces are connected with the movable sleeve and the outer cylinder. And concrete grout is prevented from flowing into the embedded sleeve in the pouring process, so that liquid leakage in the sleeve is avoided. A limiting assembly is arranged at the end, located in the outer cylinder, of the movable sleeve, the limiting assembly is used for limiting movement of the movable sleeve, through cooperation of the limiting assembly and a plugging piece, the problems that an embedded sleeve is inaccurate in positioning