The　influence　of　water　to　binder　(W/B),　types　and　dosage　of　supplementary　cementitious　materials　(SCM)　on　the　internal　relative　humidity　(IRH)　and　autogenous　shrinkage　(AS)　of　cement　pastes　caused　by　self-desiccation　were　investigated,　and　their　relationship　was　discussed.　The　results　show　that,　W/B　is　a　main　factor　that　affects　IRH　change　and　AS　of　cement　pastes　with　SCM.　With　the　decrease　of　W/B,　IRH　of　cement　pastes　decreases,　but　AS　of　cement　pastes　increases.　Different　types　and　dosages　of　SCM　affect　the　IRH　differently;　fly　ash　(FA)　reduces　AS,　silica　fume　(SF)　increases　AS,　and　the　effect　of　GBFS　on　AS　is　between　FA　and　GBFS.　The　linear　correlation　between　the　change　of　IRH　and　AS　of　cement　pastes　with　SCM　is　established.