The polyaspartic acid is synthesized by means of pyrocondensation polymerization, using aspartic acid as a monomer. The influence of react time and react temperature on the average molecular weights and yield and its biodegradability are studied; the kinetic parameters of the polymerization mechanism of aspartic acid were obtained; the relationship of the scale inhibition effect of polyaspartate, the average molecular weights, water temperature, dosage and time has been discussed. The results sh...