The invention discloses a leukocyte automatic classification method and system based on deep learning, and the method comprises the steps: receiving a leukocyte image sample set, and carrying out thenormalization and standardization preprocessing of a leukocyte image; wherein the sample set comprises a test set, a verification set and a training set; denoising the normalized and standardized leukocyte image in the sample set; carrying out image edge detection on a part of denoised leukocyte images in the test set, the verification set and the training set; respectively inputting the leukocyteimages processed by the two parts of training sets subjected to image edge detection and not subjected to image edge detection into a parallel deep convolutional neural network which is not interfered with each other for training, outputting a classification result which is obtained through a discriminant network, and adopting a verification set for verification at set intervals in the training process; testing by adopting a test set; receiving a to-be-classified leukocyte image, sequentially performing normalization and standardization, denoising and image edge detection, and obtaining a classification result through the trained two paths of parallel deep convolutional neural networks and the trained discriminant network.