The invention relates to a method for the color retouching of a raw fabric, in particular to a method for the color retouching of cotton knitted fabric on a forming machine. The method is characterized by comprising the following processing steps: blending a retouching solution, preparing the raw fabric, padding the retouching solution, water scrubbing, drying, napping and forming. By using the method for the color retouching of the cotton knitted fabric, when the color cylinder difference is discovered after the cotton knitted fabric is dyed and enters the finishing procedure after the drying and the forming, the cotton knitted fabric can be directly retouched on the forming machine; through analytic studies, reactive dyes such as M-2G blue, M-3BE red and M-3RE yellow for the padding areadopted as color retouching dyes; in order to increase the permeability of the raw fabric, a non-ionic penetrating agent is added into a padding solution, simultaneously the padding solution is addedwith anhydrous sodium sulfate and anhydrous sodium carbonate to ensure the water scrubbing chroma of the raw fabric after the color retouching, and the retouching solution can be prepared only according to the chroma; and the chroma can be adjusted to the normal quality standard through the treatments in the processing steps. The process method has the advantages of quick color retouching speed, good accuracy, no influence on other quality indexes of fabrics, cost saving and less discharge capacity.