After the assessment targets on concrete performance of anti-sulfate erosion were optimum designed rationally to be assessment parameters, the course on performance deterioration of concrete was mixing slag powder characterized using designed assessment parameters. The results show that, every performance deterioration degree of concrete can be compared on the same coordination axis by assessment parameters. The assessment parameters were applicable the same determination criterion, and the determination principle is simple and convenient. The comparing the deterioration course and sensitivity degree of concrete performance is much easy. It is better to judge concrete performance state that the concrete mixing slag powder performance of anti-sulfate erosion has been assessed with assessment parameter designed in the paper.