Path diagram drawing method and device

The invention discloses a path diagram drawing method and device, and relates to the field of path diagram drawing, and the method comprises the steps: taking to-be-drawn nodes as main nodes, and enabling all the main nodes and corresponding associated nodes to jointly generate a topology group; according to a preset model corresponding to each topology group, calculating the coordinates of each node in the group, after the calculation of the current topology group is completed, calculating the topology group containing the most associated nodes in other calculated topology groups of the main node, and after the calculation of the node coordinates of all the topology groups is completed, drawing nodes and connecting fibers; wherein the coordinates of all the nodes are located in the same rectangular coordinate system, and the connecting fiber between the two associated nodes in the preset model does not pass through the third node. The drawn path diagram can clearly display the trend of each piece of flow dat