Grinding device for sea cucumber peptide product processing

The utility model relates to the technical field of sea cucumber peptide product processing, in particular to a grinding device for sea cucumber peptide product processing, which comprises a first grinding box and a second grinding box, a screening component is arranged between the first grinding box and the second grinding box, a material returning component is arranged on the outer side of the first grinding box, and a spiral feeder is arranged in a material returning pipe. A feed inlet communicated with the lower side of the first grinding box is formed in the feed back pipe, a feed back opening communicated with the upper portion of the first grinding box is formed in the feed back pipe, and a one-way valve is arranged in the feed inlet. Materials passing through the grinding device in the first grinding box are moved upwards to an inlet in the top of the first grinding box through the material returning device and are ground again through the grinding device in the first grinding box, and the grinding ef