The invention provides a continuous production method for a vulcanization accelerator DPG. The method comprises the following steps that (1) diphenylthiourea, a catalyst, ammonium hydroxide and an organic solvent are mixed to obtain a reaction raw material mixture; (2) the reaction raw material mixture and an oxidizing agent are subjected to an oxidation reaction in a continuous flow reactor to obtain a reaction product; (3) the reaction product is post-treated to obtain the vulcanization accelerator DPG, wherein the organic solvent in step (1) can dissolve the diphenylthiourea and the vulcanization accelerator DPG. The method reduces the pressure in the reaction process, improves the utilization rate of the raw materials, stabilizes the product quality, greatly shortens the reaction timecompared with a conventional technology, improves the reaction yield, and effectively overcomes the disadvantage of traditional kettle type batch production.