The invention relates to an automobile bumper production process, which comprises the following steps in sequence: selected raw materials, baking materials, injection molding by precision injection molding machines, plastic parts trimming, upper part spraying, deep cleaning, drying, primer spraying, high-temperature baking Drying, spraying, high-temperature drying, part inspection, post-processing, accessory assembly, product packaging, the temperature of the injection molding machine: raw material drying temperature 80-100 ℃, barrel temperature 200-250 ℃, hot runner temperature 230-240 ℃, mold surface temperature 20~30℃, screw speed 40~70 rpm, raw material injection speed 37~43, 27~32, 22~27mm/s, injection time 7~15sec, injection pressure 430~460, 260~ 290, 80~110bar, cooling time 20~35sec. The automobile bumper production process of the present invention has high firmness and impact resistance of injection molded parts, can control the defect types of injection molded parts to the greatest extent, and improves the qualified rate of paint spraying in the next process; the paint has strong adsorption and meets domestic requirements. All kinds of high-end cars supporting the requirements.