This invention relates generally to the field of starch syrup production, specifically to a processing method and a device for the extrusion of raw materials with enzymes added for starch syrup, and a saccharogenic method of the extruded raw materials. This invention discloses the kind and amount of enzymes added, the appropriate parameters of the processing method and the device for the extrusion of raw materials with enzymes added for starch syrup, and the appropriate saccharogenic method of the extruded raw materials for starch syrup. The processing method and the device of this invention are such that the jet liquefaction process as used in the traditional double enzyme method for starch syrup production can be spared, and starch syrup with the same DE value can be obtained in a saccharification time which can be shorten 2-4 times the traditional saccharification time.