In　this　paper,　the　lightweight　external　wall　brick　was　prepared　by　means　of　dry　pressure　molding　sintering　process　to　explore　the　effect　of　the　pore-forming　agent　on　its　performance.　The　shale　and　clay　were　used　as　the　main　raw　materials　and　additives　of　bran,　coal　powder　and　SiC　were　chosen　as　pore-forming　agent.　The　results　show　that,　for　both　different　pore-forming　agents,　as　the　content　of　pore-forming　increases,　the　water　absorption　got　elevated　and　the　bulk　density　and　flexural　strength　got　reduced.　Moreover,　SiC　could　react　with　oxygen　to　generate　CO　and　CO2,　resulting　in　the　appearance　of　numerous　closed　pores　inside　the　green　body　after　fired.　It　was　easy　to　obtain　low　density　lightweight　external　wall　brick　which　could　exhibit　better　performance.