Considering the new generation of armed helicopter with faster speed, the overall structure of the anti helicopter smart mine is redesigned. The smart mine is designed by using modular design. Early warning module, communication module, warhead and follow-up mechanism are controlled by single chip microcomputer. Acoustic detection and data processing module is controlled by dual DSP. To meet the requirements of smart mine of low power consumption, the hardware of the early warning module is designed. To meet the requirements of anti helicopter smart mine with the real-time performance, the hardware of the acoustic detection and data processing module are completed by two pieces of high-performance floating-point DSP and CPLD as the core. All module interfaces are designed too. Through the simulation experiments, it shows that the anti helicopter smart mine based on dual DSP meeting the requirements of real-time and precision.