Efficient silicon removing agent

The invention provides an efficient silicon removing agent. The efficient silicon removing agent is prepared from the following components in parts by weight: 35 to 40 parts of magnesium oxide, 25 to30 parts of calcium hydroxide, 25 to 35 parts of sodium metaaluminate and 2 to 5 parts of poly(dimethyl-diallylammonium chloride). Aiming at the problems that almost silicon removing technologies arerelatively complicated, silicon can be efficiently removed and a water purification effect is remarkable; am adding and treatment technology is simple and the utilization cost is low; the efficient silicon removing agent can be widely applied to silicon removal treatment of oilfields and coal chemical industry. 种高效除硅剂，按重量份包括：氧化镁35-40份；氢氧化钙25-30份；偏铝酸钠25-35份；聚二甲基二烯丙基氯化铵2-5份。本发明针对大多除硅工艺相对复杂的问题，能够进行高效除硅，净水效果显著，且投加处理工艺简单，使用成本低，并能够广泛适用于油田和煤化工的除硅处理。