本文论述了高效助滤剂应具备的性能特点，作为高效助滤剂应同时具有使颗粒表面“大面积疏水”和促使微细颗粒絮凝的双重功能。提出了以线性大分子表面活性剂作为高效助滤剂的设计构思，设计并合成了能使矿物表面“大面积疏水”并兼有一定絮凝功能的大分子表面活性剂，开发出了PCRE新一代大分子表面活性剂型助滤剂。过滤实验表明，PCRE对赤铁矿具有优良的助滤性能，可将平均粒度为7．3μm的赤铁矿的滤饼水分从17.7％降至11．2％，将东鞍山浮选铁精矿的滤饼水分从16．2％降至13．6％． This paper discusses the performance characteristics of an efficient filter aid. As an effective filter aid, it should have the dual functions of “large area hydrophobic” and flocculation of fine particles. A linear macromolecule surfactant was proposed as a high-efficient filter aid. A macromolecular surfactant with large area hydrophobicity and flocculation function was designed and synthesized. A new generation of PCRE Macromolecule surfactant type filter aid. Filtration experiments showed that PCRE has an excellent drainage aid for hematite. The moisture content of hematite cake with an average particle size of 7.3μm can be reduced from 17.7% to 11.2%. The Dongringshan flotation concentrate Of the filter cake moisture dropped from 16.2% to 13.6%.