The invention discloses a handrail device of a beauty bed. The handrail device comprises handrails, supports, sliders and positioners. One end of each support is connected with the corresponding handrail, while the other end is connected with the corresponding slider. Each slider is in sliding fit with one corresponding support leg of the beauty bed, and each positioner is disposed on the corresponding slider. Therefore, the sliders are connected with the handrails through the supports, the support legs of the beauty bed support the handrails, and the positioners can lock the positions of the sliders on the supporting legs of the beauty bed, so that the height of the handrails is fixed. Through the adjustment of the positions of the sliders on the supporting legs of the beauty bed, the height of the handrails can be adjusted, thereby facilitating operation of beauticians and improving comfort for consumers.