High efficiency sewage treating agent and its prepn process

The present invention relates to high efficiency sewage treating agent and its preparation process. The high efficiency sewage treating agent consists of sodium carbonate 10-20 weight portions, trisodium phosphate 50-60 weight portions, sodium silicate 30-40 weight portions, surfactant 20-30 weight portions, and water 20-30 weight portions. Its preparation process includes the following steps: dissolving sodium silicate in water inside a sandwiched reactor through stirring and introducing steam to heat at 75-80 deg.c for 1-1.5 hr to obtain sol, cooling to 30 deg.c and adding sodium carbonate and trisodium phosphate to produce exothermic reaction at 75-80 deg.c while stirring for 0.5 hr, cooling to 20-25 deg.c, adding surfactant and further stirring for 0.5 hr, discharging, cooling to solid matter, drying and crushing to obtain the product. The high efficiency sewage treating agent has no toxicity, no smell and stable performance, and is used in treating industrial and domestic sewage.