Abstract: Electro-optical switch with plasma electrodes is one of critical components in high power ICF drivers based on the large aperture multipass amplifier array scheme. To investigate problems related to this technology an 80mm 80mm Pockels cell using a plasma electrode formed by a glow discharge on either side of a KDP crystal was designed and constructed and the switching performance was tested. This letter describes the configuration of the Pockels cell, the plasma electrode formation by glow discharge, the switch pulse generation and output performance, as well as the measurement of the switching speed and the switching efficiency across the aperture. Some typical results in the switching experiment are given.