1. A method for trademark retrieval, comprising: S 101 , establishing a sample trademark library and establishing a correlation between sample trademarks and division data for figurative element codes of known pending or registered figurative trademarks; S 102 , extracting and processing image feature information about the sample trademarks, and establishing a correlation between the sample trademarks and the extracted image feature information; S 103 , extracting and processing image feature information about a trademark to be retrieved; S 104 , taking the image feature information about the trademark to be retrieved as a retrieval condition to carry out matching retrieval, and finding out a sample trademark matching the image feature information about the trademark to be retrieved and reaching a pre-determined similarity degree, a sample trademark with a highest similarity degree to the image feature information about the trademark to be retrieved, and a corresponding figurative element code of a trademark; S 105 , acquiring and confirming a figurative element code of the trademark to be retrieved; S 106 , taking the figurative element code confirmed as a retrieval condition to carry out matching retrieval, and finding out a sample trademark matching the confirmed figurative element code; S 107 , collecting a retrieved result acquired by taking the image feature information about the trademark to be retrieved as the retrieval condition and a retrieved result acquired by taking the confirmed figurative element code as the retrieval condition; and S 108 , sequencing collected trademarks according to the similarity degree of the image feature information and reporting a trademark search result.