This conical root-cutting device was designed tosolve the problem of slow rooting and poor consistency of artificial cone rooting about Oudemansiella raphanipes. The cutting device adopts two symmetrically arranged four-bar linkage mechanisms, and the connecting rod blade forms a waist-shaped motion track. By forming a cone-shaped envelope, this device could realize the taper cutting of the root of the O. raphanipes. The industrial robot which equipped with the camera recognizes could capture and precisely control the depth of the O. raphanipes into the cutting area. The experimental results indicated that the two connecting rod blades performed a total of 12 operations in 0.8 s to complete the taper cutting. The robot could capture, cut and classify one O. raphanipes in 6 s. Taking the O. raphanipes stalk with a diameter of φ12 mm as an example, compared with the 7-pyramid, 6-pyramid, 5-pyramid, and 4-pyramid formed by artificial root cutting, the root-cutting of the robot could reduce root waste by 7.5%, 9.1%, 13.9%, and 24.4%, respectively.