Abstract: In order to solve the problem that video,voice,command and other information transmission links are easily interrupted due to the congestion of communication network when accidents such as network damage occur in the mining process, a wireless Mesh network is proposed for mine emergency communication,and the Access Point ( AP) selection algorithm of network is studied from the transport layer. Firstly,the end-to-end global transmission delay of the wireless Mesh network is taken as the optimization objective,and the transmission layer delay is used to determine whether the current transmission link is interrupted or the emergency situation of serious bandwidth decline. Secondly,Broadcast Selection Mechanism of Adjacent AP (BSM-AP) is introduced so that communication terminals of the equipment can calculate the delay of information return of different APs without pre-associated AP,and reduce the overhead of system measurement and algorithm selection. Finally,the fuzzy logic method is used to select and access an AP with optimal comprehensive performance. The algorithm implanted on the Qualcomm prototype platform was used to test the transmission success rate of downhole communication information. The test results show that the proposed algorithm can greatly reduce the network delay of critical rescue information and ensure the reliability of transmission.