The invention relates to an intelligent harvesting device for agricultural vegetable aquaculture. The intelligent harvesting device comprises a base plate, a top plate, a supporting air cylinder, a sorting device, an auxiliary device, a shearing device and a placement box; the supporting air cylinder is installed on the base plate, the top plate is installed at the top end of the supporting air cylinder, the sorting device is arranged on the top plate, the auxiliary device and the shearing device are installed at the lower end of the sorting device, the placement box is installed at the left end of the auxiliary device, the auxiliary device, the shearing device and the placement box are all installed on the base plate, and the sorting device comprises an electric sliding block, an installing plate, a lifting air cylinder, a working plate, a sorting branched chain and a guiding sliding rail. The problems that in the existing aquaculture vegetable harvesting process, the manual dependence degree is high, the labor cost is high, the working efficiency is low, and potential safety hazards exist can be solved, the functions of automatically harvesting and cutting aquaculture vegetable can be achieved, and the intelligent harvesting device has the advantages of being high in automatic degree, low in labor cost and high in working efficiency, causing no potential safety hazards and the like.