Living body detection model training method and living body detection method and device

The embodiment of the invention provides a living body detection model training method, a living body detection method and a living body detection device. The method comprises the following steps: acquiring a plurality of sub-sample images corresponding to a sample image; the living body detection model comprises a plurality of living body detection sub-models, and the sample image comprises an image area corresponding to a sample face; the sub-sample images comprise sub-sample images of different areas in the sample image, and each sub-sample image is used for training a living body detection sub-model corresponding to the sub-sample image; the sub-sample images are input into the corresponding in-vivo detection sub-models, model training is carried out, the trained in-vivo detection model is obtained, and the in-vivo detection model comprises a plurality of sub-models which focus on fraud trace identification of different areas, so that in-vivo detection can be carried out by using the in-vivo detection mod