Information retrieval method, related system and storage medium

The embodiment of the invention provides an information retrieval method, a related system and a storage medium. The information retrieval method comprises the steps that S1, according to a retrieval text Query and Ki candidate documents of the ith hop, Mi candidate documents of the (i + 1) th hop are obtained; s2, obtaining a score of each candidate document in the Mi candidate documents of the (i + 1) th hop; s3, obtaining the probability of the path corresponding to the candidate document Pjy (i + 1) according to the score of the candidate document Pjy (i + 1) and the probability of the path L; s4, K (i + 1) candidate documents of the (i + 1) th hop are obtained according to the probabilities of the paths corresponding to the Mi candidate documents of the (i + 1) th hop; and obtaining a retrieval result corresponding to the Query according to the K (i + 1) candidate documents of the (i + 1) th hop. According to the scheme, sorting can be carried out from the global optimal angle of the global retrieval pat