The invention discloses a Y-shaped triangular steel truss beam bridge suitable for span less than 200 m. The Y-shaped triangular steel truss bridge comprises a first truss and two second trusses, one end of the first truss and the second trusses are intersected at one point to form a bridge main beam, the intersected point of the first truss and the second trusses is at the highest position of truss height of the bridge main beam, the bridge main beam is integrally a tripod spatially, a plane of the bridge main beam is Y-shaped, and the second trusses are spliced to form a V-shaped main truss branched portion in the Y-shaped bridge main beam. The bridge is integrally in the shape of a tripod, the planar shape is a Y-shaped branch, and a fade shape is a triangular steel truss beam remodel. On the premise that large span is guaranteed, space below a bridge floor is small in thickness, integral rigidity is high, and the bridge is high in windproofness and seismic resistance and novel and attractive in shape and can serve as a city landmark building.