The invention relates to the field of airplane maintenance, in particular to a hanging tool of an airplane covering cap. Currently an airplane does not have a special covering cap hanging tool, so that a hanging tool needs to be designed and manufactured, when a covering cap needs to be dismounted to repair and maintain aviation electronic equipment in an associated equipment compartment, the covering cap can be directly hung on the equipment compartment while an auxiliary cable of the covering cap does not need to be dismounted. The covering cap hanging tool comprises a fixing bolt, a protection sheet, a hanging ring, an anti-fall sheet, a spring column, a terminal nameplate, a sling, a terminal and a hanging ring. When the covering cap of the airplane needs to be dismounted to repair andmaintain the aviation electronic equipment in the associated equipment compartment, the covering cap can be directly hung on the equipment compartment and the auxiliary cable of the covering cap doesnot need to be dismounted. Through simple modification, the covering cap hanging tool can be suitable for covering cap hanging work of different types of airplanes, and meanwhile, can be outfitted inthe army to be used, and repairing and fighting of the airplane are ensured.