Abstract: An easy way has been practical to make nano-Germanium oxid (GeO2)/SBA-15 composites by damp impregnation of GeCl2 by means of SBA-15 as the nanoporous sensor support. Following integration SBA-15 with GeO2, the mesoporous array of SBA-15 could still be well upholder. The sensor prepared of the nano-GeO2/SBA-15 composite display advanced sensitivities and the sensitivity to 1000 ppm of H2 could be higher than 1300 which is almost 35 times extra sensitive than that of pure GeO2 sensor. This judgment provides an inexpensive and effectual method to apply nanoporous materials to outstandingly improve the sensitivity of semiconductor metal oxide gas sensors.