Abstract: As a promising sensor,thermoelectric type gas sensor has attracted lots of interests.Normally,high performance thermoelectric materials with good all-around properties were chosen as the feedback part,while the study on the influence of each thermoelectric parameter was not well conducted till now.There has been a general lack of scientific understanding to support the material selection.In this paper,Ba_1-xSr_xPbO₃（0≤x≤1）and Pt films,were respectively prepared via solid reaction method and RF magnetron sputtering to compose a thermoelectric hydrogen sensor.The influences of thermoelectric parameters on sensor performances were investigated by comparing the output voltage of sensors,when hydrogen mixed Air with the same concentration was introduced as the testing gas.It was found that,Seebeck coefficient and thermal conductivity took great influence on the sensor’s performance.This result provides a credible criterion on the selection of feedback material for thermoelectric gas sensor.Furthermore,taking SrPbO₃ as a feedback part,a thermoelectric hydrogen sensor with wide detecting range was prepared,while commercialized hydrogen sensors couldn’t meet the standard of GB15322.This thermoelectric hydrogen sensor could be widely introduced to measure higher concentration hydrogen and evaluate the security of hydrogen leakage.