The intracellular microelectrode recording technique, channel blocker and radioisotope tracer method were used. The burst discharges were evoked by Zn²⁺, no change by sodium channel blocker——Tetrodotoxin, but abolished by calcium channel blocker——Cd²⁺. [⁶⁵Zn²⁺]_i was decreased by Cd²⁺. It is possible, that Zn²⁺, instead of Ca²⁺, goes into cells through calcium channels in the mechanism of BD evoked by Zn²⁺.