Cone beam CT Monte Carlo simulation cluster parallel acceleration method and system

The invention belongs to the technical field of Monte Carlo simulation, and particularly relates to a cone beam CT Monte Carlo simulation cluster parallel acceleration method and system, and the method comprises the steps: configuring an information transmission interface MPI for a host and each node in a cluster, determining the states of the host and the nodes connected into the cluster, and numbering each node; enabling the host to generate a plurality of pieces of Monte Carlo program data with the same number as the nodes, and setting the starting number of sampling particles in each pieceof program data according to the number of the nodes; in an MIP command mode, enabling the host to control each node to synchronously run Monte Carlo program data according to the starting number ofrespective sampled particles, enabling each node to read all particle trajectory data into a memory by using a memory mapping mechanism, respectively putting particle trajectories into grids accordingto the set detector grid s