The invention relates to a polyester color silk production process. Polyester color silk is prepared by melting polyester chips and color master batch at high temperature, and drawing the components into silk. The polyester color silk production process comprises the following steps: precrystallizing glazed wet polyester chips in a crystallizer, putting the crystal into a solid-phase polycondensation reaction kettle for polycondensation reaction with nitrogen, feeding the tackified chips together with the color master batch which is subjected to drying and dehumidification treatment and cobalt acetate into a spinning screw rod extruder for melting, feeding the molten melt into a spinning component through a metering pump, filtering the melt inside the spinning component, spraying the melt into silk bundles through a spinneret plate at relatively high pressure, blowing cold air from a slow cooling area and a cooling accumulation chamber to cool the silk bundles, feeding the silk bundles into a drawing area, drying the silk bundles, heating to shape by using a heating roller, finally coiling to form, and packaging. Through the adoption of the process procedures, various types of colored industrial long polyester silk which is superhigh in wearing resistance, superhigh in fluorescence and superhigh in flexibility can be produced, and the colored industrial long polyester silk is widely used in multiple fields such as firefighting, braids, communication optical cables, fabrics and silk threads, and is accepted by users and the market.