Limestone is usually ground with clinker, gypsum and mineral additives to produce blended Portland cement [2,3,4,7]. In this case, the main size of limestone is 20?30 ?m, limestone plays a role as filler. However, using ultrafine limestone powder (with the main size is about 2?3 ?m) creates many different properties, it becomes a mineral additive to increase the quality of cement. This paper presented some results about the effect of ultrafine limestone powder from Yenbai with a reasonable amount on some properties of Butson portland cement. When we used ultrafine limestone powder with a reasonable amount, the early strength of cement increases 20%; simultaneously, the bleeding of cement decreases.