This filter device is mainly used for filtering lubricating fluid during the processing of copper wire drawing machines. It can effectively remove impurities and copper powder particles in the lubricating fluid, attach the impurities and copper powder to the non-woven fabric, and then automatically reel them up or guide them into the dirt box, ensuring the cleanliness of the lubricating fluid and preventing it from deteriorating. The whole process is continuous and automatic, making it an ideal supporting equipment for copper wire drawing machines; thereby extending the service life of the lubricating fluid, while reducing workers' labor intensity, lowering production costs, and reducing the pollution of waste coolant to the environment.