The invention discloses an injection molding technology for a front bumper mask. The injection molding technology is characterized by comprising the following steps of raw material preparation, plasticizing and metering, injection molding preparation, injection molding, feeding, pressure maintaining, cooling, mold unloading, piece sampling, trimming and flame treatment. According to an automobile bumper obtained by adopting the technology, the production efficiency of the product can be improved, the production cost of the product can be lowered, and the quality of the finished product; a multi-valve gate is adopted, enough buffer exists in a cold rubber, and the obtained bumper is smooth and has no flaws. Drying is controlled to be performed for 2-4 h, the drying temperature is 80-90 DEG C, the water content of raw materials obtained after drying is completed is lower than 0.03%, and the bumper obtained by injection molding has no bubbles or shrinkage or sunken parts or other defects.