The invention relates to an extraction anti-gum agent for MTBE desulfurization.The extraction anti-gum agent at least contains a solvent with the boiling point ranging from 80 DEG C to 150 DEG C, and the solvent at least contains one or a mixture of two or more of C7 (and above) aromatic hydrocarbons with the boiling point ranging from 110 DEG C to 150 DEG C.The extraction anti-gum agent can efficiently remove sulfide in MTBE and also can effectively prevent coking at the bottom of an extractive distillation tower; on the premise of guaranteeing a high vaporization rate of the distillation tower, vaporization of sulfide can be effectively reduced, the distribution gradient of sulfide in the tower can be effectively reduced, and the number of tower plates needed for distillation or the reflux ratio can be effectively decreased, so that investment or operation cost is significantly lowered; the extraction anti-gum agent has a strong extraction effect on low-boiling-point sulfide; recovery or additional treatment is not needed, and no waste is generated.