A fingerprint identification module, comprising: a plurality of sensing units, wherein each sensing unit comprises a sensing transistor and a control transistor, and receives a modulation signal when it is turned on by a scanning signal from a scanning line coupled to it, and generates an output signal, the modulation signal comprises at least one signal of a first time interval and at least one signal of a second time interval during the turned on period of each sensing unit, the voltage of the modulation signal during the first time interval is a first voltage and that during the second time interval is a second voltage, the first voltage being different from the second voltage and at least one of the first voltage and the second voltage is greater than the turn-on voltage of the sensing unit, wherein the control transistor is connected to the sensing transistor for controlling the turn-on of the sensing transistor, when a scanning line connected to the control transistor transmits high voltage, the control transistor is turned on and the sensing transistor receives the modulation signal, and wherein the voltage difference between the drain and the source of the sensing transistor is greater than a first preset value, such that the sensing transistor is at a saturation area, and the gate of the sensing transistor receives the modulation signal; a collecting unit, coupled to the plurality of sensing units, for collecting output signals of the sensing units in the same column in all the first time intervals as a first signal, and collecting output signals of the sensing units in the same column in all the second time intervals as a second signal; a calculating unit, coupled to the collecting unit, for determining the difference between the first signal and the second signal as a third signal and obtaining the fingerprint information sensed by the turned-on sensing unit on the basis of the third signal; and a plurality of switching units, each switching unit when turned on receiving the modulation signal and transmitting the modulation signal to the gates and the drains of the sensing transistors in the corresponding row, preferably, the switching unit comprises a switching transistor, the gate of the switching transistor and the gates of the control transistors in the corresponding row are connected to the same scanning line, the drain of the switching transistor is connected with the gates and the drains of the sensing transistor in the corresponding row, and the source of the switching transistor receives the modulation signal, and the sources of a plurality of switching transistors are connected to each other. a plurality of sensing units, wherein each sensing unit comprises a sensing transistor and a control transistor, and receives a modulation signal when it is turned on by a scanning signal from a scanning line coupled to it, and generates an output signal, the modulation signal comprises at least one signal of a first time interval and at least one signal of a second time interval during the turned on period of each sensing unit, the voltage of the modulation signal during the first time interval is a first voltage and that during the second time interval is a second voltage, the first voltage being different from the second voltage and at least one of the first voltage and the second voltage is greater than the turn-on voltage of the sensing unit, wherein the control transistor is connected to the sensing transistor for controlling the turn-on of the sensing transistor, when a scanning line connected to the control transistor transmits high voltage, the control transistor is turned on and the sensing transistor receives the modulation signal, and wherein the voltage difference between the drain and the source of the sensing transistor is greater than a first preset value, such that the sensing transistor is at a saturation area, and the gate of the sensing transistor receives the modulation signal; a collecting unit, coupled to the plurality of sensing units, for collecting output signals of the sensing units in the same column in all the first time intervals as a first signal, and collecting output signals of the sensing units in the same column in all the second time intervals as a second signal; a calculating unit, coupled to the collecting unit, for determining the difference between the first signal and the second signal as a third signal and obtaining the fingerprint information sensed by the turned-on sensing unit on the basis of the third signal; and a plurality of switching units, each switching unit when turned on receiving the modulation signal and transmitting the modulation signal to the gates and the drains of the sensing transistors in the corresponding row, preferably, the switching unit comprises a switching transistor, the gate of the switching transistor and the gates of the control transistors in the corresponding row are connected to the same scanning line, the drain of the switching transistor is connected with the gates and the drains of the sensing transistor in the corresponding row, and the source of the switching transistor receives the modulation signal, and the sources of a plurality of switching transistors are connected to each other.