The main materials of this machine are made of national standard SUS304 stainless steel, and the whole machine is cut and assembled at one time. The external circulating heat exchanger is separated from the main body of the frying tank. The heat exchanger has the advantages of large heat exchange area, full combustion of the imported burner, good heat preservation effect of the heating system, high heat energy efficiency, and fast heating rate of edible oil after entering the heat exchanger through the high temperature circulating oil pump. The double filtration residue design has the advantages of less residue in the oil, putting an end to the blockage of the circulatory system, cleaning up the residue conveniently and quickly, prolonging the use cycle of edible oil and reducing the production cost. Automatic detection of oil level, oil temperature setting over-limit alarm, illegal operation reminder, so that the operation of the whole machine is more safe and controllable. The electric disc control mode is easy to operate and does not need to be operated by a special person. The whole machine is assembled, which is convenient for installation, transportation and maintenance.