Embodiments of the present disclosure relates to an electrode assembly, a secondary battery, a battery pack and a device. The electrode assembly includes: an electrode unit including an electrode body and an electrode terminal part electrically connected with the electrode body; and a first insulating film for being wound around the electrode unit, the first insulating film including a connection part and an extension part connected with each other, the connection part being provided with an adhesive area for connecting with the electrode terminal part, the extension part being a part of the first insulating film extending beyond an end face of the electrode terminal part, and at least part of the extension part being provided as a non-adhesive area.