A multi-functional logic gate consisting of multiple microring resonators and w aveguides is proposed in this paper.By this device,six different logic operations,including AND/NOT, OR/NOR,XOR/ XNOR,are realized through choosing different input ports and output ports.When c hanging the input ports once,two different operations can be obtained simultaneously fro m two different output ports.We use electro-optic polymer as the material of microring resonator,and two electrical signals are added into the gate.By the aid of Simulink,light intensities of di fferent output ports are simulated and the six logic operations are all proved to be feasible.Compare d with the microring logic gates reported before,our design has more logic operations,shorter respo nse time,lower energy loss and smaller size.