The present invention discloses a method for assisting people in drawing with a grayscale image as reference, comprising a training phase and an application phase, wherein the training phase comprisesthe steps: acquiring a training image and converting the training image into a grayscale image; carrying out semantic segmentation labeling on the training image to obtain a semantic segmentation image; and training deep learning model capable of converting the semantic segmentation image into the grayscale image by taking the semantic segmentation image as an input and the corresponding grayscale image as an output, to determine the model parameters and obtain a grayscale image generation model; and the application phase comprises the steps: drawing the semantic segmentation image; inputtingthe drawn semantic segmentation image into the grayscale image generation model; generating a plurality of grayscale images through calculation; and selecting the grayscale image that can be taken asa reference from the grayscale images, performing texture drawing on the semantic segmentation image to perfect the work that is drawn. The drawing assisting method converts the semantic segmentation image into a grayscale image, provides light and dark and texture references on the details of the drawing, supports an artist to find inspiration from the grayscale images, and reduces the time forthe artist to conceive the details of the work.