The ionic ezchange and adsorption and antiacid and dissolvability of Crystal Layered Sodium Silicate as a new builder were studied.The Ca 2+ exchange ability were tested in different condition by reference QB 1768-93 standare,for example its Ca 2+ exchange(CaCO 3)are 330 mg/g~360 mg/g in 35 ℃ and 20 min.Its adsorbed water can reach 30 %.Crystal Layered Sidium Silicate has better builder properties than 4 A zeolite but worse than STPP.