Local poling structure was proposed for the application in polymeric electrooptic modulator. With this structure, full symmetric push pull operation can be realized in modulator. We suggest the use of microstrip line electrode instead of coplanar electrode and the use of soltline to ground electrode in microstrip line. The overlap integral between lightwave and microwave were calculated. Performances of devices with two kinds of electrodes were compared. Results show that the performance of the modulator with local poling structure will be enhanced considerably.