The addition of CS2 into oil solvent can enhance its efficiency to dissolve paraffin, but it will result in the problem of metal corrosion. So, a method to determine the content of CS2 in oil based paraffin remover is suggested in this paper. In this method, the content of CS2 can be determined after it is swept from the oil based paraffin remover and absorbed by absorbents. So, the key to this method is to improve the efficiency and analysis accuracy of absorbing CS2. In this paper, for absorbing CS2, we designed a new type of units in the base of air sampler，and compared the standard absorbing curve and efficiency of different absorbers by spectrophotometric method. The results confirm that the alcohol solution of diethyl amine-copper acetate shouldn’t be selected to absorb CS2 due to the disturbance of redundant Cu2+；compared to alcohol-thylenediamine solution, a higher rate of CS2 absorption is obtained by using the system of methanol-potassium hydroxide and the corresponding product of absorbing is chemically stable in 2 hours. Moreover, with the self-designed setup and methanol-potassium hydroxide solution as absorbents, the adsorption efficiency of CS2 is as high as 98% and the result has good repeatability.