Network connection establishment method and device

The invention discloses a network connection establishment method and device and belongs to the technical field of Internet. The method comprises the steps that first wireless network connection is established between a first access device and a gateway device; access certification information, broadcast by a second access device, of the gateway device is obtained; second wireless network connection is established between the second access device and the gateway device according to the access certification information; the first wireless network connection and the second wireless network connection are used for transmitting data generated during communication between the second access device and the gateway device. The method solves the problem that in relevant technologies, when the distance between an access device and a gateway device exceeds a communication distance between the access device and the gateway device, wireless network connection can not be established. The effects that an access device which is far away from the gateway device is in indirect wireless network connection with the gateway device with an access device which is close to the gateway device as a relay, and the wireless network coverage range of the gateway device is expanded are achieved.