Cube-corner prism is often applied as cooperative beacon in electro-optical distance measurement and photoelectric tracking. In some special applications, the beam reflected by the cube-corner prism should be with a divergence angle to fully cover both the laser and detector at different locations of the far field. Due to the fact that normal cube-corner prism cannot diverge a beam, the differences of the beam exit point and the incident point of the cube-corner prism are considered and the divergence of the reflected beam can be realized by installing a planoconcave lens in front of normal cube-corner prism. The feasibility of the divergence of the reflected beam by using planoconcave lens and normal cube-corner prism is analyzed by the theoretical analysis method and the geometrical ray-tracing simulation method. The quantitative relationship between the divergence half angle of reflected beam and the parameters of both the incident beam and planoconcave lens geometry is studied as well. Both the theoretical and simulation results show that the divergence half angle of the reflected beam increases quasi-linearly with the incident beam radius when the incident beam radius is less than the radius of the planoconcave lens. The smaller the curvature of planoconcave radius is, the greater the divergence half angle of the reflected beam will be.