In this paper,the thinking of a new method-graphic method of constructing mutually orthogonal Latin squares of order 3t+1 is described. The foundamental procedure and the result of constructing mutually orthogonal Latin square of order 22 are presended.

• 本文介绍了用图表法构造3t+1阶正交拉丁方的思路；介绍了22阶正交拉丁方构造的步骤和结果.