The invention provides a lossless information hiding method based on a data difference value, which can achieve high-capacity lossless information hiding in various data (such as image data). The lossless information hiding method based on the data difference value is characterized in that secrete information and a difference value are jointly encoded and then are hidden in data to be transmitted, and a receiving end can completely recover the secrete information and original data. According to the lossless information hiding method based on the data difference value, information hiding is performed on only a half of original image data, and information joint hiding is performed on the other half of original image data; after the receiving end corrects the difference value, the original data can be recovered; therefore, the limitation of the traditional least significant bit data compression method is broken through, difference value coding as the cost facilitates the improvement of lossless information hiding capacity, the lossless hiding capacity of the general data is within 1/16 to 7/16, and the certain anti-compression and anti-noise properties are provided.