The 90°-arc-bend waveguide which connects the Γ-K and Γ-M waveguides is designed based on two-dimensional triangular lattice photonic crystals. The double-photon localization of Bragg reflection and total internal reflection is achieved by the introduction of defect surfaces on the arc and both sides of the Γ-M waveguide. Thus, the 90°-arc-bend waveguide based on two-dimensional triangle lattice photonic crystal with transmittance of 90% was realized in simulation.