The utility model discloses a
yarn combing device for controlling warp density, which comprises a
yarn fixing tube and an R pin, the
yarn fixing tube is a
cylindrical tube body with two open ends, a plurality of strip-shaped yarn dividing grooves are equidistantly arranged on the yarn fixing tube along the length direction, yarns respectively penetrate through the yarn dividing grooves, and the length of the main body part of the R pin is equal to that of the yarn fixing tube. The main body part of the R pin is inserted into the yarn fixing tube and limits the yarn in the yarn dividing groove; a sole timber is arranged in the yarn fixing
pipe, the cross section of the sole timber is a semicircle with the same inner
diameter as the yarn fixing
pipe, the top end of the sole timber right faces the yarn dividing groove and is a plane, a cavity for containing the R pin to be inserted is formed between the top end of the sole timber and the yarn fixing
pipe, yarn is located between the R pin and the sole timber, and the top end of the sole timber is higher than the two ends of the yarn dividing groove. Yarns penetrate into the yarn dividing grooves respectively and are inserted and fixed through the R pins, the yarns can be effectively separated and prevented from being doubled, precision and consistency of the yarns are guaranteed, and therefore the problems that at present, the yarns are prone to being doubled, experienced workers need to conduct manual correction aside, and time and labor are wasted are solved.