Coke oven starting method

The embodiment of the invention provides a coke oven start-up method, which is applied to a vertical heat recovery coke oven and an oven system, and comprises the following steps: when the temperature in a plurality of carbonization chambers reaches a preset temperature, dismounting fire beds in the plurality of carbonization chambers, and starting up the plurality of carbonization chambers according to a preset start-up sequence; closing branch pipe coal gas stop valves on a machine side coal gas branch pipeline and a coke side coal gas branch pipeline corresponding to the coal loading carbonization chamber, dismounting the machine side coal gas branch pipeline and the coke side coal gas branch pipeline corresponding to the coal loading carbonization chamber, and normally baking the other carbonization chambers; coal charging is conducted on the coal charging carbonization chamber according to the coal charging step, and the coal charging height is the same as the coal charging height during normal productio