The invention relates to a washing-free continuous dyeing method for polyester fabrics with disperse dyes. The invention mixes disperse dyes, surfactants and water and grinds them uniformly to obtain disperse dye slurry; then dilutes with water, and adds emulsified paste and Thickening agent to obtain liquid disperse dyes; add water to obtain disperse dye dyeing baths, padding polyester fabrics for dyeing, then drying, and then baking to fix the color, and finally drop the cloth to cool, and the dyeing is completed. The dyeing process of the invention is simple, the chemicals used are ecological and environment-friendly, the production efficiency is high, no dyeing waste water is discharged, energy is saved, and the invention has important practical significance for energy saving and emission reduction. The dye uptake rate of the dyed product obtained by the present invention is higher than 95%, the chemical content on the fabric is not more than 3%, the dyed fabric does not need to be washed, and the dry and wet rubbing fastness and staining fastness can reach 4-5 grades. The color fastness to fading is grade 5, meeting the quality requirements for textile dyeing.