A fingerprint identification apparatus, wherein the fingerprint identification apparatus is configured to be disposed under a display screen of an electronic device, and comprises: a support plate ; and at least one fingerprint sensor chip , characterized in that : the at least one fingerprint sensor chip being disposed at an upper surface of the support plate ; wherein an edge of the support plate bends upward to form an inverted step structure , the at least one fingerprint sensor chip is disposed in a central region of the support plate so that the at least one fingerprint sensor chip is not located on an upper surface of the inverted step structure of the support plate , an upper surface of a middle frame of the electronic device extends downward and is provided with a groove or a through hole , the inverted step structure of the support plate is configured to be mounted to an upper surface of an edge of the groove or an upper surface of an edge of the through hole , so that the at least one fingerprint sensor chip is located under the display screen of the electronic device; and the at least one fingerprint sensor chip is configured to receive a fingerprint detecting signal returned by reflection or scattering via a human finger on the display screen , wherein the fingerprint detecting signal is used to detect fingerprint information of the finger. a support plate ; and at least one fingerprint sensor chip , characterized in that : the at least one fingerprint sensor chip being disposed at an upper surface of the support plate ; wherein an edge of the support plate bends upward to form an inverted step structure , the at least one fingerprint sensor chip is disposed in a central region of the support plate so that the at least one fingerprint sensor chip is not located on an upper surface of the inverted step structure of the support plate , an upper surface of a middle frame of the electronic device extends downward and is provided with a groove or a through hole , the inverted step structure of the support plate is configured to be mounted to an upper surface of an edge of the groove or an upper surface of an edge of the through hole , so that the at least one fingerprint sensor chip is located under the display screen of the electronic device; and the at least one fingerprint sensor chip is configured to receive a fingerprint detecting signal returned by reflection or scattering via a human finger on the display screen , wherein the fingerprint detecting signal is used to detect fingerprint information of the finger. the at least one fingerprint sensor chip being disposed at an upper surface of the support plate ; wherein an edge of the support plate bends upward to form an inverted step structure , the at least one fingerprint sensor chip is disposed in a central region of the support plate so that the at least one fingerprint sensor chip is not located on an upper surface of the inverted step structure of the support plate , an upper surface of a middle frame of the electronic device extends downward and is provided with a groove or a through hole , the inverted step structure of the support plate is configured to be mounted to an upper surface of an edge of the groove or an upper surface of an edge of the through hole , so that the at least one fingerprint sensor chip is located under the display screen of the electronic device; and the at least one fingerprint sensor chip is configured to receive a fingerprint detecting signal returned by reflection or scattering via a human finger on the display screen , wherein the fingerprint detecting signal is used to detect fingerprint information of the finger. <EOS>