The invention discloses a remote sensing image registration method based on structure information and space constraint, and mainly solves the problems that matching point pairs are few, the in a traditional remote sensing image registration method, and the registration failure or precision is low. The method comprises the following steps: (1) reading the data; (2) detecting a feature point; (3) generating a feature descriptor by adopting the structure information; (4) screening the matching point pairs through the space constraint; (5) obtaining the geometric deformation parameters; and (6) performing the geometric transformation on the image to be registered. Compared with the prior art, the feature descriptor is generated by adopting the structure information, the effectiveness and therobustness of the feature descriptor are improved, and the matching point pairs are screened through the space constraint, the filtering capacity of the error matching point pairs is enhanced, the number of the correct matching point pairs is increased, the problem of registration failure of the remote sensing image is solved, and the precision of the registration of the remote sensing image is improved.