Aiming at the problem of huge amount of information generated by long-distance oil and gas pipeline early warning signal and accurate identification of early warning signal, an early warning system was proposed, which core components of the hardware platform is field programmable gate array (FPGA) and digital signal processor (DSP), the control of high-speed collection of early warning information is mainly accomplished by FPGA, the fast processing of high-volume information and precise recognition algorithm of early warning signal is mainly accomplished by DSP, data transmission between FPGA and DSP is carried out through high-speed interface to realize rapid and accurate alarm for pipeline intrusion. Completed the design of each functional module of the host computer and slave computer, the software system is designed with C# development language, and the real-time monitoring of pipeline system is implemented by means of communication of network protocol. Finally, the feasibility and accuracy of the system are proved by experiments.