The invention discloses a constant temperature and humidity drying device for diabolo processing. The constant temperature and humidity drying device for diabolo processing comprises a drying shell. An insulating shell is arranged on the outer side of the drying shell in a sleeving mode; the bottom end of the drying shell is connected to the inner walls of the insulating shell through supporting connecting plates; an air outlet and an air inlet are separately formed in the top end and the bottom end of the drying shell; an exhaust fan and an air intake fan are mounted at the air outlet and theair inlet through supporting racks, separately; electric heating plates are mounted on the inner walls of the drying shell; driving motors are fixedly mounted on the outer side of the insulating shell; the output ends of the driving motors are connected to driving shafts; the inner ends of the driving shafts are connected to rotary supporting rings; and seal rings are arranged at the connectionsof the driving shafts and the insulating shell and the connections of the driving shafts and the drying shell. The constant temperature and humidity drying device for diabolo processing can avoid heatloss while removing water in the drying shell, and not only can improve the drying efficiency of a diabolo, but also can keep a constant temperature and humidity environment in the drying shell. In addition, the diabolo can be further dried more fully and uniformly, so that the drying effect of the diabolo is improved favorably.