A fingerprint identification module , comprising: a functional substrate ; a piezoelectric material layer on the functional substrate ; an auxiliary structure at least partially located on the functional substrate ; a plurality of first driving electrodes at a side, away from the functional substrate , of the piezoelectric material layer and the auxiliary structure , wherein each of the first driving electrodes extends along a first direction, the piezoelectric material layer comprises a first edge extending along a second direction, and each of the first driving electrodes exceeds the first edge of the piezoelectric material layer in the first direction, the second direction is perpendicular to the first direction; the plurality of first driving electrodes are arranged at intervals along the second direction; the auxiliary structure is at least in contact with the first edge of the piezoelectric material layer ; the auxiliary structure comprises a slope portion ; a thickness of the slope portion in a direction perpendicular to the functional substrate gradually decreases in a direction from the first edge to a position away from a center of the piezoelectric material layer ; which is characterized in that the fingerprint identification module further comprises: a first insulating layer at a side, away from the functional substrate , of the plurality of first driving electrodes ; an acoustic wave reflective layer at a side, away from the plurality of first driving electrodes , of the first insulating layer , wherein an orthographic projection of the acoustic wave reflective layer on the functional substrate is overlapped with an orthographic projection of the piezoelectric material layer on the functional substrate . a functional substrate ; a piezoelectric material layer on the functional substrate ; an auxiliary structure at least partially located on the functional substrate ; a plurality of first driving electrodes at a side, away from the functional substrate , of the piezoelectric material layer and the auxiliary structure , wherein each of the first driving electrodes extends along a first direction, the piezoelectric material layer comprises a first edge extending along a second direction, and each of the first driving electrodes exceeds the first edge of the piezoelectric material layer in the first direction, the second direction is perpendicular to the first direction; the plurality of first driving electrodes are arranged at intervals along the second direction; the auxiliary structure is at least in contact with the first edge of the piezoelectric material layer ; the auxiliary structure comprises a slope portion ; a thickness of the slope portion in a direction perpendicular to the functional substrate gradually decreases in a direction from the first edge to a position away from a center of the piezoelectric material layer ; which is characterized in that the fingerprint identification module further comprises: a first insulating layer at a side, away from the functional substrate , of the plurality of first driving electrodes ; an acoustic wave reflective layer at a side, away from the plurality of first driving electrodes , of the first insulating layer , wherein an orthographic projection of the acoustic wave reflective layer on the functional substrate is overlapped with an orthographic projection of the piezoelectric material layer on the functional substrate . a first insulating layer at a side, away from the functional substrate , of the plurality of first driving electrodes ; an acoustic wave reflective layer at a side, away from the plurality of first driving electrodes , of the first insulating layer , wherein an orthographic projection of the acoustic wave reflective layer on the functional substrate is overlapped with an orthographic projection of the piezoelectric material layer on the functional substrate . <EOS>