A specialized visualized true triaxial physical simulation apparatus is independently developed. This apparatus is equipped with a specimen clamping and stress loading mechanism, temperature loading system, pore pressure loading system, drilling simulation system, and data acquisition system. It boasts several capabilities: 1) It can simulate the geomechanical environment such as true triaxial stress, formation temperature and pore gas pressure of real coalbed methane reservoir; 2) It can use the water injection of the drill pipe to simulate the engineering environment of the drilling fluid column pressure, and carry out physical simulation tests for dynamic monitoring of the mechanical behavior of the surrounding coal during the coal seam drilling process; 3) A pinhole camera can be used to extend into the wellbore to monitor the deformation and failure process of the wellbore in real-time; 4) It integrates sample preparation and testing functions, simplifies the stress loading system, and optimizes the device's functionality, making it more compact and streamlined; 5) It can realize parallel monitoring of multiple information such as stress, temperature, pore pressure, local stress, and wellbore deformation visualization around the coalbed methane reservoir wells. Using this device to conduct the simulation test of coalbed methane wellbore deformation under the conditions of stress and temperature changes, the results show that: as the temperature difference between the drilling fluid and the specimen increases, the deformation and failure of the wellbore intensifies, especially when the formation temperature is higher than the temperature of the drilling fluid; as the difference in the principal stress increases, the wellbore deformation is divided into three stages, and the deformation rate in the middle stage is the most significant. The development of this device provides a good test platform for the analysis of the instability mechanism of the coalbed methane reservoir wellbore.