Cross-railway framing bridge protection structure and construction method thereof

The invention relates to a cross-railway framing bridge protection structure and a construction method thereof. The method comprises the steps that after a central anti-collision guardrail above a railway influence range is constructed, construction of a cross-railway bridge is conducted in a swivel or pushing mode; and an overline cover plate section is buckled on the central anti-collision guardrail outside the railway influence range, and the overline cover plate section is translated to the upper part of the railway and is fixed on the central anti-collision guardrail. The protection structure comprises two central anti-collision guardrails arranged on the two sides of a middle zoning belt of the bridge respectively and the overline cover plate section located above the railway, and the overline cover plate section is of an inverted-U-shaped structure and can be buckled on the two central anti-collision guardrails in a sliding mode. According to the invention, the hoisting construction of the cover plate