The invention discloses a pineapple picking device which comprises a rod body. One end of the rod body is provided with a clamping handle, and the other end of the rod body is fixedly sleeved with a connecting rod. The connecting rod is connected with a fixed plate. At the distance towards the rear end of the connecting rod, the rod body is fixedly sleeved with a clamping pipe. The clamping pipe extends toward the front end to form electric soldering iron. A heating blade is arranged at the front end of the electric soldering iron. A hollow part is formed in the middle of the heating blade. Anordinary cutter controlled by a clamping handle is arranged right in front of the connecting rod, and cutting movements can be completed when the heating blade and the ordinary cutter are combined and move relatively. The ordinary cutter and the heating blade are staggered in position, the heating blade is located on the upper side, and the ordinary cutter is located on the lower side. A fence for bearing cut pineapples is arranged on the fixed plate. Disinfecting can be completed during cutting.