Embodiments of this application provide a wireless network communication method and a terminal device. The method includes: receiving, by a terminal device, information indicating a transmission direction type of a first time unit of a first component carrier and information indicating a transmission direction type of a corresponding second time unit of at least one second component carrier; and when the transmission direction type of the first time unit of the first component carrier of the terminal device is a flexible or variable transmission direction, determining, based on target information, sending and receiving manners of the terminal device in the corresponding second time unit of the at least one second component carrier.