A fingerprint image processing method, comprising: obtaining an original fingerprint trace image of a fingerprint trace left by a user on a target object, which comprises obtaining the original fingerprint trace image from an image scanning device, wherein the original fingerprint trace image is obtained by scanning a fingerprint trace region on the target object by the image scanning device; inputting the original fingerprint trace image to a pre-trained fingerprint image processing model for processing, and obtaining a target fingerprint trace image output from the pre-trained fingerprint image processing model, wherein the pre-trained fingerprint image processing model performs image-to-image translation; and using the target fingerprint trace image as a test fingerprint image for testing a fingerprint recognition device, wherein the pre-trained fingerprint image processing model is obtained through training based on sets of mirror-flipped fingerprint trace image samples and sets of real fingerprint image samples corresponding to respective fingers, a real fingerprint image is collected by a fingerprint sensor, and a degree of matching between a fingerprint in the target fingerprint trace image and a real fingerprint corresponding to the same finger is greater than or equal to a predetermined threshold, wherein before the inputting the original fingerprint trace image to the pre-trained fingerprint image processing model for processing, the method further comprises: mirror-flipping the original fingerprint trace image, wherein the inputting the original fingerprint trace image to the pre-trained fingerprint image processing model for processing comprises: inputting the mirror-flipped original fingerprint trace image to the pre-trained fingerprint image processing model; and adjusting a color value of the fingerprint trace in the mirror-flipped original fingerprint trace image by using the pre-trained fingerprint image processing model, to reduce a value of color difference between the fingerprint trace in the original fingerprint trace image and the target object. obtaining an original fingerprint trace image of a fingerprint trace left by a user on a target object, which comprises obtaining the original fingerprint trace image from an image scanning device, wherein the original fingerprint trace image is obtained by scanning a fingerprint trace region on the target object by the image scanning device; inputting the original fingerprint trace image to a pre-trained fingerprint image processing model for processing, and obtaining a target fingerprint trace image output from the pre-trained fingerprint image processing model, wherein the pre-trained fingerprint image processing model performs image-to-image translation; and using the target fingerprint trace image as a test fingerprint image for testing a fingerprint recognition device, wherein the pre-trained fingerprint image processing model is obtained through training based on sets of mirror-flipped fingerprint trace image samples and sets of real fingerprint image samples corresponding to respective fingers, a real fingerprint image is collected by a fingerprint sensor, and a degree of matching between a fingerprint in the target fingerprint trace image and a real fingerprint corresponding to the same finger is greater than or equal to a predetermined threshold, wherein before the inputting the original fingerprint trace image to the pre-trained fingerprint image processing model for processing, the method further comprises: mirror-flipping the original fingerprint trace image, wherein the inputting the original fingerprint trace image to the pre-trained fingerprint image processing model for processing comprises: inputting the mirror-flipped original fingerprint trace image to the pre-trained fingerprint image processing model; and adjusting a color value of the fingerprint trace in the mirror-flipped original fingerprint trace image by using the pre-trained fingerprint image processing model, to reduce a value of color difference between the fingerprint trace in the original fingerprint trace image and the target object. mirror-flipping the original fingerprint trace image, wherein the inputting the original fingerprint trace image to the pre-trained fingerprint image processing model for processing comprises: inputting the mirror-flipped original fingerprint trace image to the pre-trained fingerprint image processing model; and adjusting a color value of the fingerprint trace in the mirror-flipped original fingerprint trace image by using the pre-trained fingerprint image processing model, to reduce a value of color difference between the fingerprint trace in the original fingerprint trace image and the target object. inputting the mirror-flipped original fingerprint trace image to the pre-trained fingerprint image processing model; and adjusting a color value of the fingerprint trace in the mirror-flipped original fingerprint trace image by using the pre-trained fingerprint image processing model, to reduce a value of color difference between the fingerprint trace in the original fingerprint trace image and the target object.