Because　of　low　strength,　the　expanded　perlite　insulation　board＇s　application　in　building　energy　saving　is　restricted.　This　paper　discuss　change　rules　of　the　expanded　perlite　insulation　board　apparent　density　and　mechanical　strength　with　adjusting　the　amount　of　sodium　silicate,　pressing　pressure,　heating　system.　It　turned　out　that　good　thermal　insulation　performance　and　high　strength　expansion　perlite　insulation　board　is　prepared　by　mass　ratio　of　2.5:1　of　30%　of　the　content　of　solid　sodium　silicate　solution　to　expanded　perlite,　0.38MPa　of　pressing　pressure　and　105　degrees　C　condition　of　heating　temperature.