The invention relates to the technical field of graph databases, in particular to a data storage method and device based on a power grid graph database, and the method comprises the steps: obtaining aplurality of graph data to be stored; Preprocessing the graph data to be stored to form a plurality of feature graphs; Determining a storage address of the feature map in a hash table by using at least two hash functions; Wherein intervals divided by the hash table are in one-to-one correspondence with the hash functions; And storing the feature map based on the determined storage address. According to the method, the storage address of the feature map in the hash table is determined by utilizing at least two hash functions, so that the conflict of the storage address is avoided, namely, datain a power grid map database is effectively stored by utilizing a multi-hash coding mode, and the storage efficiency of the data is improved.