Abstract:Construction slope-building (material slope-building) and structure slope-building are the two ways of roof slopebuilding. Accurate slope, flat surface and neat interior space are the advantages of construction slope-building, but the disadvantage is to increase cost and roof load; the advantage of structural slope-building is cost saving, but the disadvantage is the inaccurate slope and uneven surface. Material slope-building by furnace slag will increase roof load, construction cycle and labors. According to the advantages and disadvantages of the above two processes, the cement & solid-waste based polymer EPS lightweight compact concrete is used for the slope-building, its light-weight overcomes the disadvantages of construction slope-building of increasing the roof load, and the good insulation also improves the roof insulation performance. Since its self - compacting needs no vibration, construction speed is improved and labor intensity is reduced, which brings significant comprehensive benefits.