The invention discloses a reuse system for cutting fluids of machine tools. The reuse system comprises a chip removal groove, a chip removal machine and a fluid collection tank which are connected sequentially, wherein the fluid collection tank is connected with a filter device through a fluid conveying main pipe, and the filter device is connected with the fluid conveying main pipe; the chip removal groove comprises multiple section of long-strip-shaped groove bodies, and adjacent groove bodies are connected through a flexible connection structure; a fluid return main pipe is communicated with the fluid conveying main pipe through a fluid conveying branch pipe. The reuse system for the cutting fluids of the machine tools can effectively reuse the cutting fluids of the machine tools.