The invention discloses a coin identification method and device and a cash register, and relates to the field of image recognition. According to the specific implementation scheme, the method comprises the following steps of extracting image blocks corresponding to coins from a to-be-identified image comprising the coins to form an input coin set; inputting the input coin set into a coin classification model to obtain categories and classification confidence degrees of the image blocks of the coins in the input coin set, wherein the categories include face values; classifying the image blocksof the coins with the classification confidence degrees reaching a threshold value in the input coin set into a first coin set; and taking the face values indicated by the categories of the image blocks of the coins in the first coin set as final face values of the coins. According to the coin identification method and device, face value judgment of a large number of the coins can be completed atthe same time according to the classification model, manual intervention can be avoided, and recognition time is short.