Provided are an antenna adjustment method, apparatus, and terminal device. The method is applied to a terminal device provided with an antenna, a first feed point, a wireless communication module, and at least two antenna matches, and includes: obtaining a current antenna match connected to the terminal device; determining a communication frequency band in which the terminal device operates; judging whether the communication frequency band corresponds to the current antenna match; determining a target antenna match corresponding to the communication frequency band from the at least two antenna matches if the communication frequency band does not correspond to the current antenna match; and adjusting the antenna according to the target antenna match to cause the antenna to support the communication frequency band, wherein the antenna is connected to a signal transmitting and receiving interface of the wireless communication module through the first feed point to perform signal reception or transmission.