Method for preparing colored polyester fibers through stock solution coloring

The invention discloses a method for preparing colored polyester fibers through stock solution coloring. The method comprises steps as follows: organic pigments are added to liquid-state dispersion media containing a stabilizer and sufficiently dispersed, and uniformly dispersed colored slurry is obtained; the colored slurry is added to polyester oligomer, the mixture is uniformly mixed for prepolymerization and final polycondensation reactions, polyester melts are obtained and subjected to direct spinning through a spinning manifold, and the colored polyester fibers are prepared; or colored polyester chips are firstly prepared, single-color polyester chips or various polyester chips with different colors are mixed and then subjected to indirect spinning according to demands, and the colored polyester fibers with the required color are prepared. The prepared colored slurry is stable at the normal temperature and has good compatibility with polyester; the pigments are uniformly dispersed in a polymerization sy