Method for preparing full-dull cotton-like polyester fibers

A method for preparing a full-dull cotton-like polyester fiber, comprising:

• sequentially passing a full-dull polyester pre-oriented yarn (POY) fiber and a full-dull polyester fully drawn yarn (FDY) fiber through a first yarn guide, a yarn guide tube, a second yarn guide, a first yarn feeding roller, pre-entangling, a second yarn feeding roller, a first deformation hot box, a cooling plate, a false twister, a third yarn feeding roller, a middle entangling device, a setting hot box, a setting yarn feeding roller, and oiling to obtain the full-dull cotton-like polyester fiber, wherein each of the first yarn guide and the second yarn guide is a yarn guide wheel;
• wherein a tow contacts a groove bottom of the first yarn guide and a groove bottom of the second yarn guide in a process of a movement, driving the first yarn guide and the second yarn guide to rotate;
• wherein the tow is wound around the first yarn feeding roller for 2-3 turns;
• wherein an inferior angle of the tow before and after contacting the groove bottom of the second yarn guide is 140°-160°;
• and
• wherein a linear velocity ratio of the first yarn feeding roller to the second yarn feeding roller is 1.05-1.06.