Telescopic knife sharpener device mounted on knife holder

The utility model discloses a telescopic knife sharpener device installed on a knife holder, which comprises the knife holder, a separating knife sharpener device is arranged on the knife holder, knife inserting grooves are arranged on the knife holder and the separating knife sharpener device, the knife inserting grooves are used for accommodating knives, and knife edges are arranged on the knives. A grinding wheel sliding module with a telescopic structure is arranged in the separating knife sharpener device, and the grinding wheel sliding module is in contact with the knife edge; the knife inserting groove is divided into two parts, one part is an upper knife inserting groove formed in the separating knife sharpener device, the other part is a lower knife inserting groove formed in the knife holder, and the upper knife inserting groove corresponds to the lower knife inserting groove in position. The knife rest is provided with the separating knife sharpener device, the knife sharpening device is arranged o