Abstract: This paper introduces a new interactive automatic drafting method of network chart. Using the logical interdependency between activities oradjacent ma trix of network, it can distribute the nodes and draw the arrows automatically.By interactively adjusting the nodes and choosing the suitable type of activity arrows, it makes the network chart have no or the least cross arrows, so that the network chart, which accords with the demands of engineering and whose diagram is simple, can be generated.