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With the development of marine seismic exploration, in order to realize the real-time data transmission and processing of marine seismic exploration, a seismic data acquisition board based on MPC8270 is designed; according to the requirements of real-time and large amount of data for marine seismic data acquisition, and the characteristics of MPC8270, the design of CPCI bus communication structure based on FPGA and MPC8270 that can achieve high-speed and real-time transmission of seismic data. Introduces the hardware design and realization method of the key peripheral circuit of MPC8270、 FPGA and CPCI bus circuit, and the configurations of embedded operating system VxWorks are given. The board with MPC8270 as the core processor, using FPGA as the control core circuit, real-time operating system based on VxWorks and CPCI bus, realize high speed processing and real-time transmission of seismic data；after several laboratory internal testing and field application,results show that the seismic data acquisition board can realize high speed processing and real-time transmission of seismic data, and the board performance is stable and reliable; The design of the board is simple, the structure is general, it has a certain reference value to the development of the related system of the data processing, the bus control and the information exchange and so on.