1. A method for realizing graph processing based on the MapReduce architecture, comprising the steps of: receiving an input file of a graph processing job; predicating a MapReduce task execution time distribution of the graph processing job using an obtained MapReduce task degree-execution time relationship distribution and a degree distribution of the graph processing job; and dividing the input file of the graph processing job into input data splits of MapReduce tasks according to the predicted MapReduce task execution time distribution of the graph processing job.