Microbial self-repairing concrete recycled aggregate preparation device capable of adjusting aggregate grading

The invention provides a microorganism self-repairing concrete recycled aggregate preparation device capable of adjusting aggregate grading, and relates to the technical field of concrete preparation equipment, the microorganism self-repairing concrete recycled aggregate preparation device comprises a main preparation cylinder body, a middle stirring shaft body, an upper protective cover plate and an upper connecting disc; a middle stirring shaft body is arranged inside the main preparation cylinder body, an upper protective cover plate is arranged above the middle stirring shaft body, and an upper connecting disc is arranged on the upper part of the middle stirring shaft body in a sliding manner, and is characterized in that a rear cover plate is fixed on the outer side of the upper protective cover plate, a middle connecting spring is fixed on the lower part of the upper protective cover plate, and a lower sliding rod is fixed on the lower part of the front section of the upper protective cover plate. The l