The invention discloses a method and device for unmanned acquired data synchronism. An unmanned vehicle is provided with at least one inertia measuring unit (IMU), a laser radar sensor and a camera sensor, at least one industrial computer and a hardware synchronous circuit board. The method comprises the steps that the hardware synchronous circuit board obtains collected data information in the atleast one inertia measuring unit and pulse signals of a certain frequency sent by the sensors, and after the frequency of the obtained pulse signals sent by the inertia measuring unit is lowered to apreset value, the pulse signals are sent to the laser radar sensor. The signals are processed by adopting a hardware circuit, due to the fact that the hardware body adopts a controller with the highclock precision, the time difference between data generated by the hardware body is in the microsecond level, the synchronous precision is high, modularized functional units are adopted, the modules are integrated on the small space, the integration level is high, the size is small, and the modules can be easily transplanted into different unmanned systems.