Expeirmental procedure of two or three matrice multiplication is introduced. The optical system make full use of optical parallelism. Matrix B is represented by a light source arrary, A and C are inputted by two SLM which can be replaced by two masks in this preliminary experiments. The mean error of D=ABC in our experimental system is 1.23%. When B is a unity, the results of twoimatrice multiplication have been obtained with a mean error of 1.2%.