The desulfurizing agent made up by using potassium permanganate, methyl alcohol, glycol, pentaerythritol, sulfolane, cyclohexane, alkylphenol ethoxylates, cholamine, zinc naphthenate and barium sulfonate as raw material can be added in high-sulfur heavy fuel, specially added in high-sulfur oli emulsified oil, and can be substituted for low-surfur heavy fuel to make combustion. Test shows that theOli emulsified oil in which said invented desulfurizing agent is added can obtain obvious desulfurizing effect.