Abstract: In the4G-lte system, here proposed the 4G-LTE synchronous RAN/CN overload fusion control based on QoS ordered competition. Firstly, the wireless access network and the core network was considered separately, full consideration of the categories of equipment acceptance and the maximum amount of synchronous machine type communication active number of devices, here used the activation state of the Markov chain state probability and access class restriction strategies to design radio access network and the core network overload control strategy; Secondly, by taking into account the quality of the class service, the maximum value of each eNB allowable load and the acceptable number of devices, the fusion control of RAN overload and CN overload is realized; Finally, the experimental results show that the proposed method is effective.