The invention provides an anti-collision structure of an outer side guardrail of a sharp turn lane, and belongs to the field of road traffic facilities. The structure comprises a right-angle sharp turn lane, an outer side guardrail, a floating body, a rotating device, energy dissipation layers, a light thin-wall energy dissipation pipe, a light energy dissipation material, an elastic rotating shaft, rubber rotating columns, an upper sealing plate, a roller, a rolling shaft, a damping elastic steel frame, a smooth continuous transition belt, a binding penetrating rope and built-in filling softwadding. In the anti-collision structure of the outer side guardrail of the sharp turn lane, the outer side guardrail is arranged on the outer side of the right-angle sharp turn lane, the floating body is arranged on the inner side of the outer side guardrail; the several rubber rotating columns are arranged, and two thirds of the volume of each rubber rotating column is arranged in the floating body; and the anti-collision structure has the advantages that the acting time of a vehicle and the outer side guardrail can be prolonged through the multiple energy dissipation layers, the arranged rotating device and the rubber rotating columns are beneficial for fully changing the moving direction of the vehicle, the guardrail can be protected, the vehicle can be protected, and impact force is changed into rolling friction to the maximum extent.