The invention discloses a drying device of a high-efficiency bottle cap. The device comprises a transmission chain plate and a transmission belt, wherein the transmission belt is arranged at the tailpart of the transmission chain plate, a drying machine is erected on the top of the transmission chain plate, and a support is erected at the top of the transmission belt; one side, close to the transmission chain plate, of the support is connected with a Y-shaped guide plate, the bottom of the Y-shaped plate close to the top side of the transmission belt, an oblique plane is fixedly welded to theinner wall, close to one end of the transmission chain plate, of the Y-shaped guide plate, and one end, far away from the Y-shaped guide plate, of the oblique plane close to one side of the transmission chain plate; and a counter is connected with the support in an erected mode, a U-shaped frame is erected on the outer side of the transmission belt, and the U-shaped frame is located in one side,away from the transmission chain plate, of the support. According to the device, drying effect on a bottle cap is good, the device can be used for drying multiple bottle caps at the same time, moreover, in the process of box replacing, the device is not required to be shutdown, so that the production efficiency is improved, and a use requirement of people in the production life are met.