Raw yarn frame

The utility model relates to a protofilament frame which comprises a base, a supporting rod is vertically arranged on the base, a mounting frame is rotatably connected to the side wall of the supporting rod, the protofilament frame further comprises a driving part, two abutting blocks are slidably connected to the mounting frame and located on the two sides of the mounting frame correspondingly, and the driving part drives the supporting rod to rotate. The driving piece drives the two abutting blocks to move close to each other or move away from each other, and when the mounting frame is sleeved with the wire cylinder, the driving piece drives the two abutting blocks to abut against the inner wall of the wire cylinder. The process of installing the wire cylinder on the installing frame comprises the steps that firstly, the driving piece is used for controlling the two abutting blocks to approach each other to move, then the wire cylinder is arranged on the installing frame in a sleeving mode from the side, aw