The invention discloses a method and a device for realizing load balance of a DHT (Distributed Hash Table) network. The method comprises the following steps: confirming a quantity Z of first virtual marks according to a node planning of the DHT network and a preset load unbalancing threshold, wherein Z is a natural number; uniformly dividing a whole load space of the DHT network into Z parts and marking each part of the load space with different first virtual marks; and allocating Z first virtual marks to each of the nodes according to the capacity of each of the nodes, and taking charge of the load space corresponding to the allocated first virtual marks by each of the nodes. According to the method, the load balance of data storage of the DHT network is realized while the work loads of virtual mark management and virtual mark migration are reduced.