The invention relates to a method and device for controlling the sound effect. The method for controlling the sound effect comprises the step of detecting whether a hands-free call channel of a mobile terminal is sheltered or not when the mobile terminal executes hands-free calls, and the step of adjusting the configuration of the hands-free call channel of the mobile terminal and/or outputting a warning signal to prompt a user that the hands-free call channel is sheltered when the hands-free call channel of the mobile terminal sheltered. According to the method for controlling the sound effect, when the mobile terminal executes the hands-free calls, whether the hands-free call channel of the mobile terminal is sheltered or not is detected, and when the hands-free call channel is sheltered, the configuration of the hands-free call channel of the mobile terminal is adjusted and/or the warning signal is output, and therefore the hands-free call quality of the mobile terminal can be effectively improved.