This document describes a method for testing the electronic conductivity of electrode active materials for lithium ion batteries. It is suitable for a variety of electrode active materials, such as nickel cobalt lithium manganate, lithium iron phosphoric acid, etc. The method calculates the resistance value according to Ohm's law by squeezing the powdered electrode active material into a cylindrical sample cavity and applying a voltage. In the measurement, attention needs to be paid to the degree of contact between the electrode and the sample and the effect of the temperature Humidity of the measurement environment on the results.