The invention discloses a forecast and balance method for tank level of a coke oven gas of steel makers, which comprises the following steps of: determining main gas users having influence on variation of the tank level; based on mass of existing data, creating a tank level forecast model reflecting a relation between the gas tank level and each main gas user through a modern regression modeling method; creating a flux forecast model for each main gas user through the modern regression modeling method by using mass of existing data based on the time sequence forecast thought; forecasting variation trend of the tank level for some time to come; forecasting a gas flux forecasted value of each user according to the created flux forecast model, and inputting the gas flux forecasted value into the tank level forecast model to obtain a forecasted value of variation of the gas tank corresponding to each forecasting time. The forecast and balance method for the tank level of the coke oven gas of the steel makers can accurately forecast variation trends of keeping steady, increasing and descending of the tank level of the gas tank, and can provide rational guidance for on-site dispatchers to finish balance dispatching of the gas.