The invention discloses a kind of blades of Electromagnetic Control to be oriented to dankness type tea green-keeping control system, entrance and outlet are respectively arranged with including rack, conveying device, water-removing roller, guiding device, cooling device, heating control apparatus and humidity-discharging device, the water-removing roller both ends;Two sides are provided with a pair of of semicircle roller frame for installing water-removing roller in the rack;The water-removing roller outer is provided with the mutual corresponding endless glide of semicircle roller frame, is provided with annular outer gear ring in the middle part of the roller outer that finishes;The bottom of the rack is provided with driving motor, and the main shaft of driving motor is provided with and the intermeshing driving gear of annular outer gear ring.A kind of blade of Electromagnetic Control of the present invention is oriented to dankness type tea green-keeping control system, structurally reasonable, the tea green-keeping time can be controlled during finishing roller rolls, work efficiency is high.