Abstract: With the rapid hardening sulphoaluminate cement for cementing materials,the effects of polymer on the porosity,pore size distribution,pore size and strength of foamed cement products with density of 200 kg/m3were investigated. The results indicate that with the polymer content increasing,the porosity of foamed cement products have not changed,but the pore size become gradually smaller and the strength are increasing. When the emulsion and polymer power content are respectively 0. 5%of the rapid hardening sulphoaluminate cement,the 28th days compressive strength,flexural strength and vertical surface tensile strength are increased by 8% 、13% 、28% and 5% 、10% 、25%respectively.