This application discloses an earphone upgrade method, which includes following steps: acquiring first address information of a first earphone, acquiring second address information of a second earphone through the first earphone; sending a first upgrade packet to the first earphone based on the first address information to upgrade the first earphone, meanwhile, sending a second upgrade packet to the second earphone based on the second address information to upgrade the second earphone. The present application further discloses an upgrade device, an earphone assembly and a non-transitory computer readable storage medium. The present application aims to improve upgrade efficiency of earphones.