Unitree RL GYM is a reinforcement learning platform based on Unitree robots, supporting models such as Unitree Go2, H1, H1_2, and G1. This platform provides an integrated environment for researchers and developers to train and test reinforcement learning algorithms on real or simulated robots. Its significance lies in promoting the advancement of robot autonomy and intelligent technology, particularly in applications requiring complex decision-making and motion control. Unitree RL GYM is open-source and available for free, mainly targeting researchers and robotics enthusiasts.