The invention provides an automatic fruit dicing machine and belongs to the technical field of kitchen appliances. In the operating process, pulse current is switched on to an exciting coil, and the exciting coil can continue to generate a pulse magnetic field, that is to say, when the exciting coil is switched on, the magnetic field generated by the exciting coil attracts permanent magnets to drive a replaceable cutter and a vibration sleeve to move downwards; when the exciting coil is switched off, under the effect of elastic force of a reset spring, the permanent magnets drive the replaceable cutter and the vibration sleeve to move upwards. The process is repeated at high frequency. A user holds and puts a fruit or a vegetable on the replaceable cutter and presses the fruit or the vegetable downwards, the fruit can be cut into columnar or blocky pieces by the high-frequency vibrating replaceable cutter. When columnar or blocky fruit flesh falls off to a shell, a DC motor drives a line cutter to dice the fruit flesh, and formed fruit dices fall into a container bottle. The practicality and the dicing efficiency are improved.