The invention relates to a cutting device, in particular to a multifunctional lifting cutting device for fire fighting. The device comprises a moving bottom frame mechanism, a lifting mechanism, a cutting mechanism and a clamping and protecting mechanism; and the device can perform cutting operation, change the cutting angle, change the extending length of a cutting knife, clamp an obstacle needing to be cut, lift, move, climb stairs, and run safely. The moving bottom frame mechanism is located below the lifting mechanism, the moving bottom frame mechanism is connected with the lifting mechanism in a welding mode, the cutting mechanism is located above the lifting mechanism, the cutting mechanism is connected with the lifting mechanism through bolts, the clamping and protecting mechanism is located above the cutting mechanism, and the clamping and protecting mechanism and the cutting mechanism are connected in a welding mode.