Liquid supply device, liquid supply assembly and wire cutting machine

The utility model relates to the technical field of wire cutting, in particular to a liquid supply device, a liquid supply assembly and a wire cutting machine. The utility model aims to solve the problem that the cutting quality is influenced by more impurities in the liquid supply cylinder. In order to achieve the purpose, the fluid supply device comprises a cylinder body, a fluid supply device, a fluid supply device and a fluid supply device, and a containing cavity for containing cutting fluid is formed in the cylinder body; the filtering barrel assembly is arranged on the cylinder body, the filtering barrel assembly is provided with a filtering inlet and a filtering outlet, and the filtering barrel assembly is used for filtering the cutting fluid entering the containing cavity or discharged from the containing cavity. According to the cutting fluid filtering device, the filtering barrel assembly is arranged on the cylinder body, the cutting fluid entering the containing cavity or discharged out of the con