Rotary combination tool bit for pipe breakage unfreezing and pipe breakage unfreezing device

The invention discloses a rotary combination tool bit for pipe breakage unfreezing and a pipe breakage unfreezing device. The rotary combination tool bit for pipe breakage unfreezing comprises a toolbit mounting plate, a center tool bit and a peripheral tool bit; the peripheral tool bit is arranged around the center tool bit; and the peripheral tool bit and the center tool bit are mounted on thesame side of the tool bit mounting plate at an interval. The pipe breakage unfreezing device comprises the rotary combination tool bit for pipe breakage unfreezing, a motor, a motor mounting base, ananti-freezing liquid storage tank arranged at the back end of the motor mounting base, a nozzle arranged at the back end of the anti-freezing liquid storage tank, and at least three walking wheels arranged on the outer side of the motor mounting base at intervals around the peripheral direction; a driving motor for driving the walking wheels to walk on the inner walls of pipes is arranged in the motor mounting base; and an