The invention relates to the field of building materials, and particularly discloses a polycarboxylate superplasticizer catalyzing production technology without high temperature. The polycarboxylate superplasticizer catalyzing production technology comprises the following steps: (1) sequentially adding tap water, methyl polyoxyethylene alkenyl ether, sodium persulfate and azo diisopropyl imidazoline hydrochloride into an agitation tank to be uniformly stirred; (2) adding 30-40 kg of sodium bisulfite and 150 kg of tap water into a measuring tank, fully stirring to enable the sodium bisulfite to be completely dissolved to prepare a sodium bisulfite aqueous solution; (3) sequentially adding 420 kg of water, 140 kg of acrylic acid and the sodium bisulfite aqueous solution into an overhead tank to be uniformly stirred to obtain a mixed solution; (4) opening a valve of the overhead tank to enable the mixed solution to be dropwise added into the agitation tank, performing dripping and stirring at the same time, allowing the dripping to be completed within 1 hour, and obtaining the polycarboxylate superplasticizer after discharging. The production technology has the benefits that the production efficiency is improved, the synthesis reaction temperature is reduced, the synthesis time is shortened, the production cost is greatly reduced, and environmental pollution is reduced.