Neurons are the elementary information processing units of the brain. Action potential is the basic unit of signal processing and transmission. The effect control of neuronal firing activity and, hence, that of nervous system function is one of the most attracting topics in theoretical neuroscience. It has great potential for clinic applications. In view of bifurcation mechanism of neuronal discharge, a washoutfilter aided feedback bifurcation control strategy was applied to the FitzHughNagumo neuron model. The control effectiveness on the neuron firing was discussed. The influence of control gain and washoutfilter parameter on the control effect were also studied.