The present invention can provide a frying apparatus having an oil recycling and purifying function and a frying oil separating function including: a main body casing, at least one oil tank, a cooking heater, an oil purifying and circulating unit, a rotary drive unit, and an oil-outflow preventive cover, whereby a cooking oil used for cooking fried foods can periodically or continuously purified and recycled to have a constant purity, thus cooking the fried foods hygienically and also improving the taste of the fried foods, minimizing the consumption of the cooking oil to reduce costs.