The invention relates to a helicopter rotor hub system, and provides a method for preventing drift motion of a shimmy damper side plate with a sealant. The method comprises the following steps: (a) at 15-30 DEG C, under a cleaning and dust-free environment with relative humidity of 40-70% without oil stain and pollution, the dual-component HM105B2 sealant is prepared by mixing; (b) before the shimmy damper is installed, matching places of an upper side plate and a lower side plate (8) of the shimmy damper are coated with the HM105B2 sealant, and isolating distances between gluing positions and installing holes are 10mm at least; (c) matching places of the upper side plate and the lower side plate (8) of the shimmy damper coated with the HM105B2 sealant are connected to an upper clamping plate and a lower clamping plate (3) of a main hub by glued connection; (6) the shimmy damper (4) as well as the upper clamping plate and the lower clamping plate (3) of the main hub which are glued together are sulfurized at 50 DEG C for 48 hours; (e) subsequent assembling of the hub is completed.