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Analyzing performance of the free-free beam vibration, a novel cross-node support structure of free-free beam vibration gyroscope (CNSG) is proposed. In this paper, CNSG mathematical model has been established and dynamics equation has been deduced. To compare performance of two-node support structure of free-free beam vibration gyroscope (TNSG) through ANSYS software and relative theoretical calculation. The result indicates that CNSG’s sensitivity has reduced by 10.738%, but shock resistance has increase by 94.44%, interference resistance frequency has increase by 66.02% and the cross-coupling error between the drive surface and the sensitive surface has reduced by 12.759%. Thus it gives a rational design of the support structure and provides a guideline on CNSG in complex application environment.