Abstract: The application of sulfur reduction scheme in raw C4 materials for MTBE was introduced. The measures include adopting fiber film contactor to remove H2S and mercaptans from LPG, adding a separator for separation of the light C4 and heavy C4 fractions to enhance the content of the isobutylene in MTBE feed and optimizing the FCC operation. Low sulfur content in MTBE is then obtained by these measurements. The sulfur content in MTBE could be reduced from 457?g/g to 13 ?g/g.