Image retrieval is a hot technology in the field of computer technology nowdays. this paperpresents a novel image retrieval algorithm which is mainly used to solve problems for image retrieval in large image database. Firstly, preprocess the sample images, abstract the color histogram information of the partial image block and then calculate the sum of information. Extract several images and calculate their color histogram information as the first step. Calculate the Euclidean Distance of the color histogram information between sample image and each image in the database. Then search the simil...