The invention provides a dynamic balance control method for an organic residual liquid and waste water combined purifying system. Catalytic combustion integrated treatment is conducted on residual liquid and waste water in a fluidized bed. In order to ensure system stability, an energy dynamic balance controller is designed for residual liquid and waste water feeding. A double closed-loop transformation ratio value is adopted for controlling the thought. Firstly, heat balance is conducted on the residual liquid and the waste water, and the initial specific value of the controller is determinedthrough heat balance; then, real-time heat balance is conducted according to changes of residual liquid heat values and the waste water COD during system running, real-time adjustment is conducted onthe specific value of the controller according to a calculation result, and the optimal feeding proportion is ensured; and finally, the energy dynamic balance controller meanwhile has a safety compensation control function, when the temperature of a fluidized bed exceeds the limit range, the dynamic energy balance controller can further adjust the heating electric pressure of a heating furnace, and therefore it is ensured that the temperature in the fluidized bed is constant, and energy dynamic balance of a whole treatment system is achieved.