In this paper we will consider spin magnetic moment of proton on base of weak electromagnetic unified theory.We localize Hiseneberg’s concept of global isospin and create a approximate model of proton-neutron doublet by imitating the weak electromagnetic unified model under the concept of the local isospin.It’s easy to introduce the heavy guage boson into the new model.In the concept of the week electromagnetic unified idea

the electromagnetic force and weak force are considerered having same strength as to...