Abstract
By applying Parikh-Wilczek's semi-classical tunneling method we obtain the emission rate of massless uncharged particle at the event horizon of non-accelerating and rotating blackhole with electric and magnetic charges. We consider the spacetime background dynamical and incorporate the self-gravitation effect of the emitted particles when energy conservation and angular momentum conservation are taken into account. We find that the emission rate at the event horizon is equal to the difference of Bekenstein-Hawking entropy before and after emission. We also find the Hawking temperature