The invention discloses a taro harvesting device, which comprises a drive plate, a fixed point, a swing rod, a fixed rod, a cutting head, an eccentric wheel, a first cylindrical gear, a first synchronous belt, a second cylindrical gear, a second synchronous belt, a third synchronous belt, a first shell, a through hole, a motor, a first transmission shaft, a first bevel wheel, a second bevel wheel,an irregular rod head, an irregular rod body, a second transmission shaft, a spring column, a dial head, and a second shell. The motor is vertically and fixedly mounted on one side of the bottom of the first shell. The structure of the taro harvesting device is compact, and thus the taro harvesting device can be conveniently installed on a taro harvesting functional machine. Cut-off stems and leaves can be pushed to two sides. The irregular rod body with a bionic pulling effect is used to pull and cut off residual stems. The dial head can enhance the force. During the rotation process of theirregular rod body, the stems are clamped by the lower end of the irregular rod body and pulled out; when the irregular rod body rotates to the front end and contacts with the first shell, the irregular rod body is expanded by the spring column, the clamping force is reduced therefore, and the taro harvesting device is convenient to use.