The histological structure of cerebellar cortex was observed and expression of RT-97,KGF,Bax proteins in the cerebellar cortex was investigated by immunohistochemistry in Ailurus fulgens.Results showed that cerebellar cortex of A.fulgens consists of molecular layer,Purkinje cell layer and granular layer.RT-97 appeared to express in the Purkinje cell layer,granular cell axon in granular layer and molecular layer as well as medulla.KGF-immunopositive cells were found in all layers.Bax protein was present in the molecular layer,Purkinje cell layer and granular layer.RT-97,KGF and Bax proteins might play different roles in the construction of neuromechanism in cerebellar cortex.