The invention relates to a plastic bottle blowing process. The plastic bottle blowing process comprises the following steps of (1) manufacturing a bottle preform mold, putting a raw material into a charging barrel, heating the raw material in the charging barrel, injecting the raw material into an injection mold and taking out the raw material in the injection mold after the raw material is cooledand solidified to obtain plastic bottle preforms; (2) conducting blow molding, specifically, taking out heated pipe blanks in sequence, putting the first pair of pipe blanks into bottle mold clamp mouths to be clamped stably and pressing a start button; (3) bottle blowing, wherein the bottle blowing process comprises mold closing, mouth sealing, rod dropping, air blowing, air discharging, mouth opening, rod rising, mold opening and program stopping; and (4) taking out blown bottles, detecting whether the blown bottles are qualified or not, putting the second pair of heated pipe blanks into the mold, pressing the start button to conduct second circulating production. Through the plastic bottle blowing process provided by the invention, the processing bottles are uniform in wall thickness and free of flashes and postprocessing. The bottoms of plastic parts do not have joint seams. The strength is high, and the production efficiency is high.