Abstract: With the continuous development of brain-computer interface (BCI) technology, bio-machine hybrid intelligent robots based on BCI are showing unprecedented potential. The core of this technology lies in the direct interaction between robots and the central nervous system of animals, integrating machine and biological intelligence, providing a new path for behavior enhancement. This paper introduces the basic principles of BCI technology and discusses its application progress in behavior enhancement, including breakthroughs in electrode design, signal acquisition and processing, and neural feedback mechanisms. In particular, the paper focuses on the application of invasive brain-computer interfaces (invasive BCI, iBCI) in behavior enhancement, explaining how precise regulation of brain activity can enhance cognitive, perceptual, and motor abilities, thus opening new directions for human capability enhancement. Additionally, the paper forecasts the future development trends and challenges of iBCI technology and explores the broad application prospects of hybrid intelligent systems in special tasks.