Seedling raising tray disinfection device and disinfection method thereof

The invention discloses a seedling raising tray disinfection device and a disinfection method thereof. The disinfection device comprises a rack; a disinfection box body which is arranged on the rack and provided with a disinfection channel with openings in two ends; a bearing conveying channel which is arranged in the disinfection channel in a penetrating mode, wherein two ends of the bearing conveying channel extend out of openings in the two ends of the disinfection channel; a plurality of first water gun nozzles which are arranged at an upper part in the disinfection channel and face an upper surface of the bearing conveying channel; a plurality of second water gun nozzles which are arranged at a lower part in the disinfection channel and face a lower surface of the bearing conveying channel, wherein as the bearing conveying channel drives the seedling raising tray to pass through the disinfection channel, the first water gun nozzles and the second water gun nozzles spray disinfectant to a front face and a