A multifunctional furnace dismounting and bale breaking machine with a double breaking function and double power comprises a chassis and a rotary platform and further comprises a large arm, a hydraulic system, a gas system, a hydraulic hammer, a pneumatic hammer or/and a hydraulic shear and/or a slag hook. A plurality of hydraulic loops and compressed air pipes are arranged in the large arm, and the hydraulic hammer, the pneumatic hammer or/and the hydraulic shear or/and the slag hook are selectively arranged at the front end of the large arm, and are selectively connected with corresponding oil pipelines and gas pipelines. According to the machine, the hydraulic hammer can be used through a hydraulic system branch, and the pneumatic hammer can be used by being externally connected with a central gas source. A crude oil engine can be used as power without external power electricity. A multifunctional bale breaker or a multifunctional furnace dismounting machine can be used with a motor as the power under the condition of the external power electricity, the function of achieving multiple purposes through one machine is achieved, no failure happens to production and online operating of a steelmaking process line, and smooth production is guaranteed.