Abstract: The open-source radiation hydrodynamics code OSUKI, originally developed for heavy ion beam-driven inertial confinement fusion, cannot be directly used for laser-target interactions. To overcome this limitation, we develop a two-dimensional (2D) laser ray tracing and energy deposition calculation module for OSUKI based on the geometric optics approximation and inverse bremsstrahlung absorption. The module employs the ENO scheme to achieve high-precision evaluation of physical quantity gradients on unstructured grids. Numerical calculations of laser propagation trajectories and energy deposition are performed using ray trajectory equations combined with second-order Gaussian quadrature, rigorously satisfying the laws of refraction and reflection at grid boundaries. The module is validated with benchmark cases for targets with a quasi-parabolic channel and a linearly gradient spherical shell. The obtained ray trajectories, density-gradient distributions, and energy deposition results show excellent agreement with analytical solutions, achieving higher accuracy than comparable codes. After coupling this module into OSUKI, self-consistent radiation hydrodynamics simulations of laser-driven inertial confinement fusion are realized, producing results quantitatively consistent with those obtained with the FLASH code. This module fills the technical gap of laser loading in radiation hydrodynamics codes on Lagrangian unstructured meshes. It features high computational efficiency and strong adaptability, providing a reliable numerical tool for laser fusion physics research.