Due to its distinctive traits such as low energy consumption， high transmittance， potent anti-interference capacity， fingerprint， THz flexible regulation assumes a crucial role in detection， imaging， radar， and military defense， and has garnered significant attention from scholars both domestically and internationally in recent years. Nevertheless， high costs and losses remain significant factors restricting the advancement of terahertz regulation. Perovskite materials possess outstanding photoelectric properties， a straightforward preparation process， the capacity for mass production， and thereby become one of the most promising materials for the fabrication of terahertz detectors. Additionally， the facile tunability of perovskite compensates for the difficulty in adjusting the metasurface and meets the requirement for tunable metasurface. The combination of the two enables effective regulation of terahertz in the light field. In this paper， we have designed two types of coded metasurface composed of organic-inorganic hybrid perovskite CH₃NH₃PbI₃， polyimide， and aluminum， and manipulated the operating frequencies of the two structures through light field control. The results were compared with theoretical calculations to verify the effect. The first structure can be controlled by the light field to select between a broadband operating frequency and high efficiency. The second structure functions only at 0.1THz and can vary the phase through light， thereby reversing the phase of the original structure to control the direction of beam reflection. On this basis， we fabricated the device and verified it. To a certain extent， this paper fills the void in the field of optical field regulation of coded metasurface and offers a train of thought for subsequent research.