The invention relates to the technical field of crushing machines, and discloses a multifunctional crushing machine. The multifunctional crushing machine comprises a charging barrel, a rotary shaft, blades and a motor. A feeding port is formed in the charging barrel. A vent is formed in the side wall of the charging barrel. The rotary shaft is externally connected with the motor and extends in the charging barrel. The multifunctional crushing machine further comprises a first connecting rod, a second connecting rod, an iron ring and a magnetic induction box. The first connecting rod and the second connecting rod are arranged in the rotary shaft in the length direction of the rotary shaft, and the tail end of the first connecting rod and the tail end of the second connecting rod extend out of the rotary shaft. The tail ends of the connecting rods are statically connected with the iron ring. The iron ring is arranged in the magnetic induction box rotationally connected with the rotary shaft. The multiple blades are hinged to the first connecting rod and the second connecting rod at intervals. Electric heating wires are arranged in the blades. The electric heating wires are electrically connected with current leads arranged in the connecting rods. The multifunctional crushing machine is further provided with a storage battery and a control switch. The multifunctional crushing machine is used for conducting working procedures including crushing, blow-drying, hot melting and stirring simultaneously.