Training data cleaning method, portrait segmentation network training method and portrait segmentation method

The invention is suitable for the technical field of data processing, and provides a training data cleaning method, a portrait segmentation network training method and a portrait segmentation method, and the training data cleaning method comprises the steps: obtaining a first training data set; wherein the first training data set comprises training images containing face information; performing face detection on the training image to obtain face labeling information and face orientation information corresponding to the face labeling information; the training images with the face orientation information not meeting the preset orientation condition in the first training data set are removed, and a second training data set is obtained; calculating a human face area proportion corresponding to the training image in the second training data set according to the human face labeling information; and the training images of which the face area proportions do not meet a preset proportion condition in the second trainin