Based on the microwave method with using sucroses as raw materials and concentrated hydrochloric acid as catalyst and acidifier,a product of levulinic acid and formic acid by-products are generated by the intermediate product 5 - hydroxymethyl-furfural and decarboxylation.The experimental results have shown under the condition that the concentration of hydrochloric acid being 4mol/L,the concentration of sucrose being 50g/L and 70% of the microwave power being used with a five-minute reaction time,the most maximum acid production can be reached at the rate of 52.4%.It is obviously improved compared with the rate 22.4% on the literature value. Based on the microwave method with using sucroses as raw materials and concentrated hydrochloric acid as catalyst and acidifier,a product of levulinic acid and formic acid by-products are generated by the intermediate product 5 - hydroxymethyl-furfural and decarboxylation.The experimental results have shown under the condition that the concentration of hydrochloric acid being 4mol/L,the concentration of sucrose being 50g/L and 70% of the microwave power being used with a five-minute reaction time,the most maximum acid production can be reached at the rate of 52.4%.It is obviously improved compared with the rate 22.4% on the literature value.