Objective To obtain an experimental relationship between mechanical property and electrical property of an contracting muscle. Methods The tibial nerve of rabbits was stimulated by impulse current with different pulse width and different current intensity giving by electromyography, meanwhile the Conductive Amplitude of Motion Potential (CAMP) of the gastrocnemius and it's contractile force were recorded. Results Experimental curver of contractile force vs electromyographic signals were obtained.Conclusion The contractile force was positively correlative with the impulse current intensity, and had linear relationship with the Conductive Amplitude of Motion Potential (CAMP) as well as with the value of electromyographic integral.