The invention relates to a high-precision ultralow frequency six-dimensional force micro-vibration measuring system, and the system belongs to a field of high-precision measuring system technology. The problem that the measuring system in prior art has low measuring precision and inflexible installation interface is solved. The measuring system comprises a box body, a load disc, four vertical piezoelectric sensors, six horizontal piezoelectric sensors, six lateral positioning plates, a signal adjustment device and a data acquisition and processing system; wherein the box body is formed by a shell body and a base, the load disc is formed by a bottom disc and a mounting column, the vertical piezoelectric sensors are impacted by a top surface in the shell body and a top surface of the bottom disc, the horizontal piezoelectric sensors are respectively impacted by the side surfaces of the bottom disc and the side surfaces of the lateral positioning plates, charge signals measured by ten piezoelectric sensors are converted into voltage signals through the signal adjustment device, the voltage signals are analyzed and calculated by the data acquisition and processing system, so that three dynamic forces and three dynamic bending moments of a disturbance source are obtained. The measuring system can precisely measure the disturbance force of the disturbance source, the installation interface is flexible and easy to operate, and the system has high measurement reliability.