Assembling tool for cutter holder and cutter tube of biopsy rotary cutting needle outer cutter

The utility model relates to a tool for assembling a cutter holder and a cutter tube of a biopsy rotary cutting needle outer cutter, which comprises a tool base, a control box and a workbench, the control box and the workbench are arranged above the tool base, the control box is arranged behind the base through screws, the workbench is arranged in front of the base, the workbench consists of an air cylinder, a fixed seat and a fixed table, a groove is arranged on the fixed seat, and the fixed table is arranged in the groove. A groove is formed in the fixing base, a push block is embedded in the groove and can slide in the groove in the fixing base, a limiting block is arranged in front of the groove, a vertically-arranged installation block is arranged behind the groove, an air cylinder is installed behind the installation block, a push rod of the air cylinder penetrates through the installation block and then is fixed in the groove formed behind the push block, and a push head is installed above the push blo