CoPc(SO

3

)

4

complexes have been encapsulated in the supercage of zeolite Y and their redox properties have been investigated by cyclic voltammetry with a CoPc(SO

3

)4/Y graphite and polystyrene composite electrode.The results show that the electrochemical behavior of the zeolite-occluded CoPc(SO

3

)

4

arises in three different potential ranges around-0.67 V

-0.27 V and 0.55 V

indicating that there are three kinds of redox behaviors between different Co ion and between Co ion and ligand.This indicates that CoPc(SO

3

)

4

molecules can undergo electron transfer inside the rigid matrix of Y zeolite

with the redox potential changed and the plane structure of CoPc(SO

3

)

4

twisted.