A method for fingerprint acquisition, applied at a chip of optical type for fingerprint acquisition, comprising: in response to presence of a fingerprint on a photosensitive region of the chip of optical type for fingerprint acquisition, acquiring a plurality of configuration parameters, wherein the plurality of configuration parameters comprise a first exposure duration, a first region and a target photosensitive value, and the plurality of configuration parameters are stored in the chip of optical type for fingerprint acquisition in advance or are delivered by an application software, and wherein the first region is a local region in the photosensitive region; exposing the first region according to the first exposure duration, and acquiring a photosensitive value of the first region; determining a second exposure duration required to acquire the target photosensitive value in the photosensitive region according to the photosensitive value of the first region and the first exposure duration; and acquiring a fingerprint image according to the second exposure duration; characterised in that wherein the plurality of configuration parameters further comprise one or both of an upper limit duration corresponding to the photosensitive region and a lower limit duration corresponding to the photosensitive region, and the upper limit duration and the lower limit duration satisfy the following relationship: T2_max = T0 + T0 ∗ a1 T2_min = T0 − T0 ∗ a 2, wherein T0 is a default exposure duration when the terminal leaves a factory, T2_max is the upper limit duration, T2_min is the lower limit duration, and a2 is greater than or equal to a1, and values of a1 and a2 range as follows: 10 % ≤ a1 ≤ 30%, and 30 % ≤ a2 ≤ 50%; and acquiring the fingerprint image according to the second exposure duration comprises: acquiring the fingerprint image according to the upper limit duration in response to the plurality of configuration parameters further comprising the upper limit duration and the second exposure duration being longer than the upper limit duration; and acquiring the fingerprint image according to the lower limit duration in response to the plurality of configuration parameters further comprising the lower limit duration and the second exposure duration being shorter than the lower limit duration. in response to presence of a fingerprint on a photosensitive region of the chip of optical type for fingerprint acquisition, acquiring a plurality of configuration parameters, wherein the plurality of configuration parameters comprise a first exposure duration, a first region and a target photosensitive value, and the plurality of configuration parameters are stored in the chip of optical type for fingerprint acquisition in advance or are delivered by an application software, and wherein the first region is a local region in the photosensitive region; exposing the first region according to the first exposure duration, and acquiring a photosensitive value of the first region; determining a second exposure duration required to acquire the target photosensitive value in the photosensitive region according to the photosensitive value of the first region and the first exposure duration; and acquiring a fingerprint image according to the second exposure duration; characterised in that wherein the plurality of configuration parameters further comprise one or both of an upper limit duration corresponding to the photosensitive region and a lower limit duration corresponding to the photosensitive region, and the upper limit duration and the lower limit duration satisfy the following relationship: T2_max = T0 + T0 ∗ a1 T2_min = T0 − T0 ∗ a 2, wherein T0 is a default exposure duration when the terminal leaves a factory, T2_max is the upper limit duration, T2_min is the lower limit duration, and a2 is greater than or equal to a1, and values of a1 and a2 range as follows: 10 % ≤ a1 ≤ 30%, and 30 % ≤ a2 ≤ 50%; and acquiring the fingerprint image according to the second exposure duration comprises: acquiring the fingerprint image according to the upper limit duration in response to the plurality of configuration parameters further comprising the upper limit duration and the second exposure duration being longer than the upper limit duration; and acquiring the fingerprint image according to the lower limit duration in response to the plurality of configuration parameters further comprising the lower limit duration and the second exposure duration being shorter than the lower limit duration. acquiring the fingerprint image according to the upper limit duration in response to the plurality of configuration parameters further comprising the upper limit duration and the second exposure duration being longer than the upper limit duration; and acquiring the fingerprint image according to the lower limit duration in response to the plurality of configuration parameters further comprising the lower limit duration and the second exposure duration being shorter than the lower limit duration.