The invention provides a method for alleviating coking of a coke tower top oil gas pipeline. The method comprises the following steps: 1, spraying parts of quenching oil into a coke tower from the upper part or the top of the coke tower, and pre-quenching a coke tower top oil gas; and 2, spraying the other parts of the quenching oil in a tower outlet oil gas pipeline into the pipeline, and quenching the high temperature oil gas in the tower outlet oil gas pipeline. The method allows the temperature of the coke tower top oil gas to be effectively reduced and a secondary reaction to be timely inhibited, so the coking of the coke tower top oil gas pipeline can be effectively alleviated, and the on-stream period of a coking delay apparatus is prolonged.