In the era of "Internet +", the rapid development of artificial intelligence. Some repetitive and mechanized manual operations are gradually replaced by artificial intelligence. Deep learning, as an important stage of artificial intelligence, makes it possible for machine learning to identify human thinking, which is helping us to solve many large and small social development needs. When the machine has such a neural network, the brain can be simulated to receive external information and data. Through the extraction and calculation of layer by layer neural network, the loss value can be trained and the optimal weight value can be obtained, so as to obtain the possible conclusion of human brain. Bank card card number recognition, based on deep learning input card card number is a solution to our life like a small, but in the life everywhere must operation, because manual input card card number, card number digits long, easy to lose the wrong leakage, more time consuming, also like this relatively tedious work, the realization of the machine to replace manual, it is very necessary.