This research performe a numerical simulation using Ansys Fluent to optimize the thermal and optical performance of a tubular solar collector. This design improves conventional systems, adding a cylindro-parabolic reflector made of reflective material placed behind the collector tubes to reflect the solar radiation usually lost in other conventional TSC. This system allows to capture both direct and reflected solar radiation, increasing the energy absorption in the collector. The results demonstrate that the thermal and optical efficiency of the system depends on the focal angle of the reflector. Scenario 0, representing the configuration without the reflector, provides a baseline efficiency of 63.71%. And by adding reflectors behind the tubes, we observed the changes in all scenarios. The highest efficiency value was found in scenario 3, with 64.97%. The results indicate that adding those reflectors enhances thermal and optical efficiency, and reducing the focal angle tends to improve the concentration of reflected radiation reflected to the absorber tube. However, after an optimal point is attained in decreasing the angle, the gains become marginal. Also, the polished aluminum used in the study performed better performance as a reflector compared to polished steel, due to its high emissivity. The use of an oxidized copper tube also proved advantageous for its high absorption capacity for solar radiation. Adding a well-designed parabolic reflector can increase the thermal and optical performance of the TSC, provided that the curvature of the reflector is optimized and appropriate materials are chosen for the reflector and the collector tube.