The present application relates to a binder, a binder composition, a preparation method, a negative electrode slurry, a negative electrode plate, a secondary battery, a battery module, a battery pack and an electrical apparatus. The binder here comprises: an inner core material having a glass transition temperature of −50° C. to 0° C., and a shell layer material located on at least part of the surface of the inner core material and having a glass transition temperature of 60° C. to 100° C.