In seismic data processing environment, the seismic data writing has imbalance without seismic data distribution optimization in the file system pool when large scale seismic data frequently perform writing and deleting operations. This study analyzes the seismic data processing classification and various conventional writing strategies of seismic data. It proposes a seismic data writing strategy based on the idea of probability which meets the optimization distribution of seismic data writing under different initial files in system pool. The experimental results show that the method is effective.