The present invention provides a method for adapting an antenna, an antenna and a terminal. The antenna includes at least a first antenna segment, and the first antenna segment is made of a deformable
alloy. Through the method provided by the present invention, when the terminal is detected When in the communication state, the current communication
frequency band of the terminal can be obtained, and the corresponding target antenna
electrical length can be obtained according to the communication
frequency band. Based on the target antenna
electrical length, the antenna of the terminal can be set to include For the first antenna segment, the
electrical length of the antenna of the terminal can be adjusted to the target antenna electrical length by adjusting the electrical length of the first antenna segment, so that the electrical length of the antenna when the terminal communicates in the current
frequency band is the electrical length of the antenna with the highest
antenna efficiency, greatly improving The quality of the communication
signal during user communication is improved, and at the same time, the
power consumption of the terminal is small, and the
heat generation is small, which improves the user experience.