Adhesive tape replacing structure for packing machine

The utility model provides an adhesive tape replacing structure for a packing machine, and relates to the technical field of adhesive tape rollers. The adhesive tape roller body is provided with a fixed bearing column in the left-right direction, a fixed column is arranged on the right end face of the fixed bearing column, a vertically-through threaded hole is formed in the middle of the fixed bearing column, a regular hexagonal prism is arranged on the left end face of the fixed bearing column, and a threaded column is arranged on the left end face of the regular hexagonal prism of the fixed bearing column. A rotary bearing cylinder in the left-right direction is installed on a fixed column of the fixed bearing column through a bearing, an annular groove is formed in the inner circumference of the left end of the rotary bearing cylinder, and the rotary bearing cylinder is conveniently installed and rotated through the bearing by arranging the fixed bearing column; the adhesive tape roll supporting block is c