The frying production line adopts an oil - water mixing slag filtering structure and a full - oil longitudinal slag scraping or side - scraping system, with frequency conversion speed regulation. During frying, the residues of the fried products sink into the water under the oil tank. The residues will not form carbon and can be discharged through the sewage valve along with the water. At the same time, a large amount of edible oil contained in the residues returns to the oil layer after oil - water separation. In this way, it not only greatly extends the service cycle of the oil, reduces oil consumption, and has a very obvious oil - saving effect, but also makes the fried products have a better color, aroma, and taste, and a cleaner and more beautiful appearance. The machine is equipped with a lifting system, which can lift the conveyor to an appropriate height, making it extremely convenient to clean and overhaul the machine. It is suitable for users whose frying time is between 15