An automatic unlocking method for a mobile terminal within a distance, wherein the automatic unlocking method comprises the following steps: performing (S100) in advance an (ID) verification code match between the mobile terminal and a wearable device, for utilizing the wearable device to unlock the mobile terminal for auto-sensing unlocking of the mobile terminal; detecting (S200), by the mobile terminal, whether the wearable device has performed the ID verification code match when a screen of the mobile terminal is locked by utilizing (A1) firstly a low frequency signal to search within a first distance range; characterized in that , the automatic unlocking method further comprising the following steps: detecting (S200), by the mobile terminal, whether a wearable device has performed the ID verification code match by utilizing (A2) a high frequency signal to search within a second distance range when the mobile terminal does not detect the wearable device that has performed the ID verification code match within the first distance range, wherein the second distance range is wider than the first distance range; determining (S300), by the mobile terminal, whether a distance between the mobile terminal and the wearable device is within a predetermined distance range when the mobile terminal detects the wearable device that has performed the ID verification code match; and unlocking (S400) automatically by the mobile terminal and entering an operation interface when the distance between the mobile terminal and the wearable device is determined to be within the predetermined distance range. performing (S100) in advance an (ID) verification code match between the mobile terminal and a wearable device, for utilizing the wearable device to unlock the mobile terminal for auto-sensing unlocking of the mobile terminal; detecting (S200), by the mobile terminal, whether the wearable device has performed the ID verification code match when a screen of the mobile terminal is locked by utilizing (A1) firstly a low frequency signal to search within a first distance range; characterized in that , the automatic unlocking method further comprising the following steps: detecting (S200), by the mobile terminal, whether a wearable device has performed the ID verification code match by utilizing (A2) a high frequency signal to search within a second distance range when the mobile terminal does not detect the wearable device that has performed the ID verification code match within the first distance range, wherein the second distance range is wider than the first distance range; determining (S300), by the mobile terminal, whether a distance between the mobile terminal and the wearable device is within a predetermined distance range when the mobile terminal detects the wearable device that has performed the ID verification code match; and unlocking (S400) automatically by the mobile terminal and entering an operation interface when the distance between the mobile terminal and the wearable device is determined to be within the predetermined distance range. detecting (S200), by the mobile terminal, whether a wearable device has performed the ID verification code match by utilizing (A2) a high frequency signal to search within a second distance range when the mobile terminal does not detect the wearable device that has performed the ID verification code match within the first distance range, wherein the second distance range is wider than the first distance range; determining (S300), by the mobile terminal, whether a distance between the mobile terminal and the wearable device is within a predetermined distance range when the mobile terminal detects the wearable device that has performed the ID verification code match; and unlocking (S400) automatically by the mobile terminal and entering an operation interface when the distance between the mobile terminal and the wearable device is determined to be within the predetermined distance range. <EOS>