The invention provides a method of restorable semi-fragile watermarks on the basis of HSB (highest significant bit) and LSB (least significant bit). In the method, digital watermarks is embedded and authenticity of images is detected by using the Logistic chaotic sequences and scrambling method and the characteristics of LSB and HSB bit planes in the images, watermark information is generated by HSB coding, embedding positions of watermarks is calculated by using the scrambling method, the watermarks is embedded in LSB and tampering regions is located by combining the chaotic sequences by means of the characteristics that the capacity of the watermark information of the LSB bit planes in a spatial domain is high, and the HSB bit planes have relative stability under the circumstance of image tampering and watermark attacking. The invention can not only accurately detect and locate the malicious tampering information of the images, but also more accurately restore the tampered information of the original image and ensure that the influence on the quality of the original image is low.