A wireless network connection establishment method and a terminal device are provided. In the embodiments of the present invention, a first terminal device obtains wireless network information that is used to join a wireless network on which the first terminal device is located, and sends the wireless network information to a second terminal device in a near field communication (NFC) manner, so that the first terminal device can receive a first request message that is sent by the second terminal device according to the wireless network information, and establish a wireless network connection to the second terminal device according to the first request message. With NFC characteristics, such as convenient communication, a short communication distance, and high reliability, a problem in the prior art that a configuration operation is complex and error-prone is avoided, thereby improving configuration efficiency and reliability.