A terminal anti-lost method, comprising: detecting, by a terminal (1000; 1100) when receiving a specific instruction, whether the terminal is currently in a lock screen state, wherein the specific instruction is used to represent an instruction of controlling the terminal to decrease volume and/or an instruction of preventing the terminal from receiving a carrier signal; and skipping executing, by the terminal (1000; 1100), the specific instruction when detecting that the terminal is in the lock screen state, and controlling the terminal to increase the volume and/or play an alarm tone by using a loudspeaker of the terminal; wherein the method further comprises: when the terminal (1000; 1100) in the lock screen state detects headset insertion, deactivating, by the terminal, the headset insertion and keeping the loudspeaker effective; wherein after the terminal (1000; 1100) in the lock screen state detects the inserted headset, and before the step of the deactivating, by the terminal, the headset insertion and keeping the loudspeaker effective, the method further comprises: prompting, by the terminal (1000; 1100), a user to cancel the lock screen state of the terminal; and if the lock screen state of the terminal is not canceled in a first predetermined time, triggering the step of the deactivating, by the terminal (1000; 1100), the headset insertion and keeping the loudspeaker effective. detecting, by a terminal (1000; 1100) when receiving a specific instruction, whether the terminal is currently in a lock screen state, wherein the specific instruction is used to represent an instruction of controlling the terminal to decrease volume and/or an instruction of preventing the terminal from receiving a carrier signal; and skipping executing, by the terminal (1000; 1100), the specific instruction when detecting that the terminal is in the lock screen state, and controlling the terminal to increase the volume and/or play an alarm tone by using a loudspeaker of the terminal; wherein the method further comprises: when the terminal (1000; 1100) in the lock screen state detects headset insertion, deactivating, by the terminal, the headset insertion and keeping the loudspeaker effective; wherein after the terminal (1000; 1100) in the lock screen state detects the inserted headset, and before the step of the deactivating, by the terminal, the headset insertion and keeping the loudspeaker effective, the method further comprises: prompting, by the terminal (1000; 1100), a user to cancel the lock screen state of the terminal; and if the lock screen state of the terminal is not canceled in a first predetermined time, triggering the step of the deactivating, by the terminal (1000; 1100), the headset insertion and keeping the loudspeaker effective. when the terminal (1000; 1100) in the lock screen state detects headset insertion, deactivating, by the terminal, the headset insertion and keeping the loudspeaker effective; wherein after the terminal (1000; 1100) in the lock screen state detects the inserted headset, and before the step of the deactivating, by the terminal, the headset insertion and keeping the loudspeaker effective, the method further comprises: prompting, by the terminal (1000; 1100), a user to cancel the lock screen state of the terminal; and if the lock screen state of the terminal is not canceled in a first predetermined time, triggering the step of the deactivating, by the terminal (1000; 1100), the headset insertion and keeping the loudspeaker effective. prompting, by the terminal (1000; 1100), a user to cancel the lock screen state of the terminal; and if the lock screen state of the terminal is not canceled in a first predetermined time, triggering the step of the deactivating, by the terminal (1000; 1100), the headset insertion and keeping the loudspeaker effective. <EOS>