In order to improve the recording speed and satisfy the requirement of shooting range, in this paper the bottleneck was found by analyzing the data channels of whole system; through studying the relation of file size and storage rate and adopting the technology of map file composing and segmentation, RAID 0,make the storage rate of disk improved and the data channels of system ameliorated. Finally the speed of the whole system has been improved, the integration and real-time requirement of recording data are ensured.