In the development of the city, due to its own road network and terrain, there are some irregular intersections. As a conversion node for various types of traffic, the intersection is always the bottleneck of urban traffic congestion. Limited by its own geometric features, the traffic are more complicated at the irregular intersection. This paper combines the intersection channelization and signal timing research of an irregular intersection in xiamen . Selecting the optimization plan through the comparison of traffic delays based on Synchro. Summarizing the rectification ideas and providing relevant experience for similar intersection improvement. Keywords:irregular intersections , intersection channelization, signal timing, intersection improvement ，SYNCHRO

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