Foamed cement is a kind of light and porous material prepared with cementitious material through chemical foaming process.The relation between the pore structure and property of foamed cement is researched in this paper.The results show that the pore structure of foamed cement can be controlled by changing the ratio of water, thickening agent and foam stabilizer content.With the increase of the average pore size, the compressive strength of the foamed cement shows the first increase and then decrease.When the average pore size is about 1200μm, the compressive strength of foamed cement is higher.The suitable mix proportion of foamed cement with high compressive strength and suitable pore structure is proposed.