The invention discloses a user overlapping behavior-combined Microblog overlapped community partitioning method, relates to the field of Microblog user behavior assessment and overlapped community division, and in particular to an algorithm capable of displaying Microblog user overlapping behaviors and dividing Microblog overlapped communities. The method comprises the following steps of: firstly,constructing a relational network according to mutual concerning relationships of users, and assessing user overlapping behaviors such as user mutual-concerning behaviors, forwarding behaviors and mentioning behaviors; secondly, carrying out weight fusion according to the user overlapping behaviors so as to obtain relationship assessment functions between the users; and finally, weighting the relational network, fusing the user overlapping behaviors into a greed group expansion overlapped community division algorithm, and taking a Microblog weighting network as an initial network to improve community fitness functions. According to the method, user overlapping behaviors are embodied in community division, so that the overlapped community division quality in the Microblog network can be improved and the community structures embody that the users carry out communication intimately.