The utility model provides an educate seedling tray disinfection system, includes disinfection system and ultraviolet drying device, the disinfection system includes conveyer, and conveyer's upside is equipped with the antiseptic solution shower nozzle, and the low reaches of antiseptic solution shower nozzle are equipped with the antiseptic solution brush, and the antiseptic solution brush is located conveyer's upper and lower both sides, the below of antiseptic solution shower nozzle and antiseptic solution brush is equipped with disinfection fluid recovery unit, still includes antiseptic solution circulating device, ultraviolet drying device is become by air -blower, air heater, wind channel, protection casing, ultraviolet radiation lamp assembly, and the conveyer rear end is equipped with the protection casing, and upper end and lower extreme are equipped with the ultraviolet radiation fluorescent tube in the protection casing, and the protection casing passes through wind channel intercommunication air heater, and air heater communicates the air -blower, simple structure, and the practicality is strong, and the disinfection is automatic, secondary sterilization, air heater 0, the thorough disinfection avoids the antiseptic solution to corrode staff's skin, is applicable to and uses the relevant industries utilization of educating air heater 1.