Fuente: WIPO "hemp" The invention discloses a method for preparing pectin from fresh sisal hemp residues. The method comprises the steps of decomposing fresh sisal leaves into three parts including sisal hemp fiber, sisal hemp juice and sisal hemp residues, using fresh sisal hemp residues, completely removing disordered fiber in the sisal hemp residues until no purities exists, extracting the sisal hemp residues as a raw material, pre-processing the raw material, killing enzyme, rinsing with water, performing microwave-assisted acid water extraction by using an emulsification device, , treating and concentrating an extracting solution, performing alcohol precipitation and filtering, and drying, so as to obtain the pectin. Compared with the prior art, the method provided by the invention has the advantages that 1, the yield of the pectin is high, no purities generate, the process is simple, the energy consumption is low, and large batch production is easy. 2, During the acid hydrolysis, the emulsification device is used for assisting extraction, and has the advantages of short extraction time and high yield; in the filter liquor concentration step, a membrane separation technique is used, and has the advantages of no purities, and easy industrialization; the drying process adopts a freeze drying technology, and an obtained product has the advantages of light color and luster and no need of decoloration. The pectin provided by the technology provided by the invention is low-fat pectin, and has the advantages of good solubleness, and easiness in gel formation.