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In order to ensure the reliability of long-distance control and data transmission in data acquisition applications, and meet the requirements of multi-channel signal interface switching and parallel data acquisition, a multi-channel acquisition and switching system based on FPGA and TCP/IP is designed. The system uses Xilinx Spartan-6 series FPGA as the main control chip, which can meet the switching of 8 groups of 13 channels, and the synchronous acquisition and real-time transmission of 16 analog signals. The system uses the architecture of FPGA+TOE to realize TCP/IP , and is equipped with a monitoring host computer. The experimental results show that the system is capable of long-term stable multi-channel switching , high-speed acquisition and real-time transmission. It is convenient to use and highly reliable, and has certain application value in the field of distributed acquisition.