The invention discloses a vibrating kitchen knife. The vibrating kitchen knife comprises a knife body, a knife handle, an electromagnet and a circuit board. The electromagnet comprises an iron core, a coil, a vibrating plate, plate springs and a case. The coil is installed on the T-shaped iron core of the electromagnet. The case is connected with the iron core, and the two sides of the lower part of the case are connected with the vibrating plate through the U-shaped plate springs. An air gap of 0.5 mm is reserved between the vibrating plate and the iron core. The knife body is inserted into a groove of the vibrating plate and is connected to the vibrating plate through rivets. The circuit board, a socket and a switch are installed in the hollow knife handle, the knife handle is connected to the side surface of the case, the socket is electrically connected with the circuit board through the switch, and the output end of the circuit board is electrically connected with the coil. The vibrating kitchen knife can cut hard food in a labor-saving mode.