Oil expelling resistant separator

The utility model relates to a separator, in particular to an oil expelling resistant separator, which comprises a gas outlet, a buffer gas storage bag, an isolation plate, a liquid level pressure controller, an oil gas separator, an oil gas inlet, an oil outlet and a casing. The top of the casing is provided with the gas outlet, the isolation plate is arranged inside the casing, and the buffer gas storage bag is formed in the space between the isolation plate and the top of the casing. The liquid level pressure controller and the oil gas separator are arranged in the middle inside the casing. The oil gas separator comprises a liquid level pressure separation umbrella and an oil gas separation element. An inlet of the oil gas separation element is connected with the oil gas inlet, and the oil outlet is disposed at the bottom of the casing. The oil expelling resistant separator has the advantages that firstly, the liquid level pressure control valve of the oil expelling resistant separator can be adjusted auto