A design method of the micro inertial measurement unit（MIMU）system is introduced.It is consist of power supply module

data acquisition and data processing modules.Data acquisition module collects MIMU’s signals using 16 bits precise AD and floating-point amplifier.Data processing module deals with data using high-speed single-chip and embedding computer.And the software of this system is designed.The system’s configuration is simple

and it provides with a new thought for strapdown system’s miniaturization.Practical application shows that the design method is workable.