Aiming at the contradiction between the differentiated traffic requirements and the limited network resources in the transmission pipe gallery networks, a multi-traffic delay optimization-oriented resource management strategy is proposed in this paper. On the premise of ensuring the throughput requirements of delay sensitive traffic, this paper designs a reasonable spectrum resource sharing mechanism to improve the capability of the transmission pipe gallery network to carry sub-priority traffic and reduce the transmission delay of high priority traffic. Firstly, this paper proposes a sub-priority task-oriented equipment clustering method to reduce the interference in the transmission pipe gallery network. Then, based on the Hungarian algorithm, a spectrum sharing scheme is proposed to reduce the transmission delay of high priority traffic. Compared with the existing benchmark schemes, the proposed scheme can improve the traffic throughput of the transmission pipe gallery net.