A kitchen waste crushing device, comprising a shell (2), a cutting motor (1), and cutting blades (15). An output shaft of the cutting motor (1) is connected to a blade shaft by means of a first coupling (3); the cutting blades (15) are mounted on the blade shaft; the shell is provided with a feeding window (11); the cutting blades (15) are worm gear blades which can rotate and then form a pressure in a discharging direction; the cutting blades (15) are located in a crushing compartment (8); the crushing compartment (8) is located in the shell (2); an inlet of the crushing compartment (8) is connected to the feeding window (11); a discharge port is formed on the outer wall of the crushing compartment (8). The kitchen waste crushing device is not prone to blockage, achieves smooth discharging, and facilitates secondary use.
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