Abstract: In the optimization study on gathering pipeline network (GPN) of the oil and gas field, the optimization model becomes more difficult to solve due to its "curse of dimensionality". In order to solve this problem, a series of studies were conducted in this paper. After the related literatures were investigated and studied, the existing GPN achievements of the oil and gas field were reviewed from the aspects of pipeline network connection structure optimization and pipeline route optimization. Then each sub-problem in GPN optimization model of the oil and gas field was analyzed and corresponding solution method was summarized systematically and comprehensively. Finally, the proposals on the optimization of stellated, insert branched and circular pipeline networks were put forward and the research ideas for the GPN optimization of the oil and gas field in the future were also provided.