An apparatus for implementing touch key and fingerprint identification, comprising: a fingerprint identification sensor used for collecting fingerprint information applied on a cover glass of a terminal device; a fingerprint identification circuit connected with the fingerprint identification sensor and used for analyzing and processing the fingerprint information collected by the fingerprint identification sensor to obtain a fingerprint analysis result; a capacitive touch sensor used for collecting a capacitance generated on the cover glass; a capacitive touch circuit connected with the capacitive touch sensor and used for analyzing the capacitance collected by the capacitive touch sensor to obtain a capacitance variation; and a switch used for controlling the fingerprint identification sensor and the fingerprint identification circuit to turn on and controlling the capacitive touch sensor and the capacitive touch circuit to be disconnected when receiving a turn-on signal; and controlling the capacitive touch sensor and the capacitive touch circuit to turn on and controlling the fingerprint identification sensor and the fingerprint identification circuit to be disconnected when receiving a cut-off signal; characterized in that: said fingerprint identification sensor comprises multiple-layers of circuits providing a shielding function reducing capacitive touch signals, said multiple-layers of circuits being in a float status when the switch receives the cut-off signal; said fingerprint identification sensor is provided below said cover glass; said capacitive touch sensor has a high Signal-Noise-Ratio SNR; and said capacitive touch sensor is provided below said fingerprint identification sensor. a fingerprint identification sensor used for collecting fingerprint information applied on a cover glass of a terminal device; a fingerprint identification circuit connected with the fingerprint identification sensor and used for analyzing and processing the fingerprint information collected by the fingerprint identification sensor to obtain a fingerprint analysis result; a capacitive touch sensor used for collecting a capacitance generated on the cover glass; a capacitive touch circuit connected with the capacitive touch sensor and used for analyzing the capacitance collected by the capacitive touch sensor to obtain a capacitance variation; and a switch used for controlling the fingerprint identification sensor and the fingerprint identification circuit to turn on and controlling the capacitive touch sensor and the capacitive touch circuit to be disconnected when receiving a turn-on signal; and controlling the capacitive touch sensor and the capacitive touch circuit to turn on and controlling the fingerprint identification sensor and the fingerprint identification circuit to be disconnected when receiving a cut-off signal; characterized in that: said fingerprint identification sensor comprises multiple-layers of circuits providing a shielding function reducing capacitive touch signals, said multiple-layers of circuits being in a float status when the switch receives the cut-off signal; said fingerprint identification sensor is provided below said cover glass; said capacitive touch sensor has a high Signal-Noise-Ratio SNR; and said capacitive touch sensor is provided below said fingerprint identification sensor. said fingerprint identification sensor comprises multiple-layers of circuits providing a shielding function reducing capacitive touch signals, said multiple-layers of circuits being in a float status when the switch receives the cut-off signal; said fingerprint identification sensor is provided below said cover glass; said capacitive touch sensor has a high Signal-Noise-Ratio SNR; and said capacitive touch sensor is provided below said fingerprint identification sensor.