The invention relates to a method for quickly determining ash content in a sulfenamide vulcanization accelerator, the method comprises the following steps: using a conductivity meter to determine the conductivity of deionized water to obtain conductivity C1 of the deionized water at 25 DEG C, taking a sulfenamide accelerator sample, adding the sample into the deionized water, mixing evenly, then standing for 2min-10min to prepare a sample solution, and then using the conductivity meter to determine the conductivity of the sample solution to obtain conductivity C2 of the sample solution at 25 DEG C; and according to a formula W=K2(C2-K1*C1)*% to calculate the ash content in the sulfenamide vulcanization accelerator; the method for quickly determining the ash content in the sulfenamide vulcanization accelerator is simple and practicable and is convenient to operate, and the detection time is short; and through use of the method, the ash content determination of a single sample takes about 10 min, the ash content determination of batch sample takes about 5 min-8 min, compared with a method specified in national standard GB/T11409, the detection time is substantially shortened, the ash content being qualified or not can be quickly calculated only with the need of detection of the conductivity, a detection process is rigorous with a small error, and detection results are accurate and intuitive.