The invention provides a coke oven maintenance method which comprises steps as follows: the temperature of a to-be-maintained combustion chamber of a coke oven is reduced to a range of a first preset temperature, and the temperature of a combustion chamber adjacent to the to-be-maintained combustion chamber is reduced to a range of a second preset temperature; after an oven roof and an oven door of the to-be-maintained combustion chamber are dismounted, to-be-maintained brickworks of the to-be-maintained combustion chamber are dismounted; when the to-be-maintained combustion chamber is maintained, the adjacent combustion chamber is subjected to temperature rise control, and the temperature of the adjacent combustion chamber is increased to a range of a third preset temperature after maintenance of the to-be-maintained combustion chamber are finished; and preset gaps are formed between adjacent brickworks after maintenance ends. With the adoption of the technical scheme, the problem of secondary damage of an oven wall due to the fact that the brickwork temperature and the sizes of the preset gaps in the joint positions of new and old brickworks cannot be controlled effectively is solved, so that the size of the maintained combustion chamber is standard, the brickworks are neat, the loss and the cost are reduced, and the yield of the coke oven is increased.