Stress-strain　relationship　of　concrete　materials　proposed　in　the　International　Code　(CEB-FIP1990)　and　the　Chinese　Code　(GB50010-2002)　of　concrete　structure　design　is　used　to　describe　the　static　deformation　characteristics　of　cement　mortar　material.　The　model　parameters　are　studied　via　the　experimental　data,　and　they　show　that　the　stress-strain　relationship　proposed　by　the　two　codes　can　well　describe　the　deformation　characteristic　of　cement　mortar　materials　by　adjustment　of　material　parameters.　Based　on　stress-　strain　relationship　of　cement　mortar　materials,　herein,　a　uniaxial　dynamic　strength　criterion　is　proposed　to　obtain　the　uniaxial　dynamic　stress-　strain　relationship.　The　dynamic　experimental　result　of　cement　mortar　materials　in　our　previous　reports　confirms　that　the　dynamic　stress-　strain　relationship　is　able　to　describe　the　uniaxial　dynamic　mechanical　characteristics　of　cement　mortar　materials.　In　addition,　the　dynamic　stress-　strain　relationship　is　verified　with　dynamic　experimental　results　of　cement　mortar　materials　in　the　literatures.