Calcium carbonate, calcium phosphate, calcium sulphate scale inhibition performance is excellent, and can effectively inhibit the formation of silica scale, and has a good role in stabilizing metal ions such as zinc, manganese and iron. PAPEMP salinity scale inhibitor for reverse osmosis membrane systems, multi-stage flash systems high, high turbidity, temperature scale and corrosion inhibition system (such as systems scale coal high temperature and high turbidity water vaporization system), textile assistant agents and paper additives (yellowing inhibitors), can replace EDTA, DTPA, NTA, etc.