Cement pastes containing glass powder that was made by waste beer bottles were prepared. The compressive strengths of cement pastes containing glass powder were tested. The type, content, morphology and elementary composition of hydration products in cement paste containing glass powder were studied by using X ray diffraction(XRD), thermogravimetric and differential thermal analysis(TG DTA), scanning electron microscopy(SEM） and energy dispersive spectrum(EDS） techniques. The test results show that the compressive strength of cement paste decreases with inreasing content(by mass) of glass powder. The main hydration products in cement paste containing glass powder are C S H gel, Ca(OH)2 and a small amount of ettringite and hydrated calcium aluminate. As the pozzolanic reaction of glass powder consumes Ca(OH)2, the content(by mass) of Ca(OH)2 in hydration product decreases with the increase in content of glass powder and the increase of age. The microstructure of cement paste containing glass powder is relatively dense, the morphology of C S H gel in hydration product is different from the gel in that of ordinary cement paste. This kind of C S H gel that has the network structure formed by irregular stumpy and lamelliform gel granule has a low mass ratio of calcium to silicon. Glass powder has pozzolanic activity.