The invention discloses a method for synthesizing a rubber vulcanization accelerator CZ. In the method, hydrogen peroxide and sulfuric acid are mixed to serve as an oxidant, and an M-Na salt and cyclohexylamine serve as raw materials. The method is characterized by comprising the following steps of preparing the oxidant according to the molar ratio of sulfuric acid to hydrogen peroxide to water being 1: 2.05-2.3:7; adding cyclohexylamine into a reaction kettle, dripping the M-Na salt at a flow velocity of 1.5-2.5 millimole/min at the temperature of 30-60 DEG C under the condition that the rotating speed is 600-1200 revolutions per minute, and simultaneously dripping 0.15 mol of oxidant, wherein the molar ratio of cyclohexylamine to the M-Na salt is 1:1, the dripping speed and amount of the oxidant are based on the molar ratio of sulfuric acid in the oxidant to the M-Na salt of 1:2, and the dripping time is 2-3 hours; after the reaction is finished, performing suction filtration, washing, filtering and drying to obtain the rubber vulcanization accelerator CZ. The purity of the accelerator CZ is 98.5 percent, the yield is 97 percent, and the method is simple in process and easy for industrial production.