A method for wireless communication, applied to a terminal device (110, 300, 600) connecting with a first network and a second network, comprising: reducing, by the terminal device (110, 300, 600) when an uplink duty cycle of the second network is greater than a maximum uplink duty cycle of the second network, a total transmit power of the first network and the second network and/or the uplink duty cycle of the second network, causing a specific absorption ratio, SAR, value of the terminal device to be less than or equal to a preset value, wherein the uplink duty cycle of the second network is a proportion of time domain resources that can be used for uplink transmission in a time unit, wherein a connection between the terminal device and the first network is a primary connection, and a connection between the terminal device and the second network is a secondary connection, characterized in that the method further comprises: acquiring, by the terminal device, a current uplink-downlink ratio of the first network; determining, by the terminal device, the maximum uplink duty cycle of the second network according to the current uplink-downlink ratio of the first network, and a correspondence between uplink-downlink ratios of the first network and maximum uplink duty cycles of the second network; and reporting, by the terminal device, the maximum uplink duty cycle of the second network to a network device (120, 130) of the second network. reducing, by the terminal device (110, 300, 600) when an uplink duty cycle of the second network is greater than a maximum uplink duty cycle of the second network, a total transmit power of the first network and the second network and/or the uplink duty cycle of the second network, causing a specific absorption ratio, SAR, value of the terminal device to be less than or equal to a preset value, wherein the uplink duty cycle of the second network is a proportion of time domain resources that can be used for uplink transmission in a time unit, wherein a connection between the terminal device and the first network is a primary connection, and a connection between the terminal device and the second network is a secondary connection, characterized in that the method further comprises: acquiring, by the terminal device, a current uplink-downlink ratio of the first network; determining, by the terminal device, the maximum uplink duty cycle of the second network according to the current uplink-downlink ratio of the first network, and a correspondence between uplink-downlink ratios of the first network and maximum uplink duty cycles of the second network; and reporting, by the terminal device, the maximum uplink duty cycle of the second network to a network device (120, 130) of the second network. acquiring, by the terminal device, a current uplink-downlink ratio of the first network; determining, by the terminal device, the maximum uplink duty cycle of the second network according to the current uplink-downlink ratio of the first network, and a correspondence between uplink-downlink ratios of the first network and maximum uplink duty cycles of the second network; and reporting, by the terminal device, the maximum uplink duty cycle of the second network to a network device (120, 130) of the second network.