An optoelectronic voltage sensor is proposed which is based on electro luminescent (EL) effect of light emitting diode (LED).The voltage sensing unit is mainly composed of a resistor and two LEDs.The AC voltage to be measured is applied to the resistor with a resistance of greater than 100MΩ,an d a leakage current of ~μA will be produced and the two LEDs are driven.The voltage sensing signals produced by the two LEDs are transmitted to two photodetectors through two pieces of plastic optical fibers ,and they can be obtained from the detection of light intensity.When the resistance is ~100MΩ,50Hz AC voltage in the range of 0.2－5.5kV has been measured at room temperature.There exists a good linear relationship betwee n measurand AC voltage and output voltage sensing signal,and the nonlinear error of experimental data is le ss than 3.1%.A compensation method for the temperature drift of output voltage has been proposed and proved by usin g the experimental data obtained from two branches of sensing signals.In the temperature range of －40－60℃ a nd the measurand voltage range of 5.5kV,the temperature drift of output sensing signal is within ±2.1%.Advantage s of the proposed voltage sensor mainly include no need of additional light source,simple configuration,and low cost.