The invention discloses a chemical fabric dyeing process, which relates to fabric dyeing and comprises the following steps of raw fabric preparation, fabric preparation, singeing, water washing, presetting, dyeing, sand washing, wastewater treatment, sizing, packaging and warehousing. The device has the beneficial effects that equipment and manpower are orderly combined, the automation degree is high, the process continuity is good, the production efficiency is high, short hair on the surface of the gray fabric can be removed, creases and wrinkles on the gray fabric can be eliminated, the surface of the gray fabric is neat and flat, and therefore the subsequent dyeing quality of the gray fabric is effectively guaranteed, and the production efficiency is improved. Various impurities on the grey cloth can be removed, the drapability of the grey cloth is improved, the texture of the grey cloth is enhanced, and therefore the quality of the grey cloth is improved, wastewater can be discharged after being treated in a centralized mode, and environmental pollution can be effectively avoided.