The invention discloses a multi-functional secondary grinding juice machine, which comprises a casing, a first motor, a first rotating shaft, a juice extracting chamber, a cover, a first drain valve,a second motor, a second rotating shaft, a first connecting terminal, a second terminal, a grinding chamber, a sliding slot, a sliding plate, a first magnet, a second magnet, a sealing plate, a escapehole, a handle, a disassembling sleeve, a blocking net, a conductive ring, and a second drain valve. The multi-functional secondary grinding juice machine has the advantages of being simple in operation and powerful in function. Firstly, built-in secondary juice grinding design can make juice be polished twice after the first juice extraction, which improves the delicateness of the juice and enhances the taste of the juice. Secondly, the design of disassembling blocking net not only facilitates the cleaning, but also achieves the replacement of the blocking net, which expands the practicalityand finally achieves good promotion and application.