This article aims at teaching situation of computer application course in current Higher Vocational technology College, combines the author’s practice in teaching computer application course, analyses partial factors on the affections of computer application course teaching, and puts forward some suggestions of the teaching reform.

On the basis of analysis of the raw materials,using the fineness modulus of aggregate mixture,the deviation factor of synthetic gradation and objective gradation as technical indexes,the best aggregate ratio is attained through the application of computer operations.