This invention relates to an automatic constant pressure regulation system suitable for human body and used to be connected with a human body tissue, comprising a container for receiving a liquid, a connection piping for being connected between the human body tissue and the container, a switching device connected to the connection piping and lying between a first end part and a second end part, a liquid pressure sensing device disposed to the switching device for sensing a liquid pressure of the human body tissue, a liquid level sensing device disposed to the container for sensing the liquid level of the liquid in the container, and a control module electrically connected to the switching device, the liquid pressure sensing device, and the liquid level sensing device. The connection piping has a first end part for being communicated with the human tissue and a second end part communicated with the container. When being in a first switching state, the switching device communicates the first end part, the liquid pressure sensing device without communicating the first end part and the second end part and the liquid pressure sensing device senses the liquid pressure of the human body tissue. When being in a second switching state, the switching device communicates the first end part and the second end part without communicating the first end part and the liquid pressure detection device. The control module controls the switching of the switching device according to the liquid pressure value sensed by the liquid pressure sensing device and the liquid level value variation sensed by the liquid level sensing device.一種適用於人體的恆壓自動調節系統,用來與一人體組織連接,並包含一用來容置一液體的容器、一用來連接於該人體組織與該容器之間的連接管路、一連接於該連接管路並介於該第一、二端部之間的切換裝置、一設置於該切換裝置並用來感測該人體組織的一液體壓力的液壓感測裝置、一設置於該容器並用來感測該容器內的液體的液位的液位感測裝置,及一電連接於該切換裝置、該液壓感測裝置與該液位感測裝置的控制模組,該連接管路具有一用來與該人體組織連通的第一端部,及一與該容器連通的第二端部,當該切換裝置在一第一切換狀態時,該切換裝置連通該第一端部與該液壓感測裝置但不連通該第一、二端部,且該液壓感測裝置感測該人體組織的液體壓力,當該切換裝置在一第二切換狀態時,該切換裝置連通該第一、二端部但不連通該第一端部與該液壓感測裝置,該控制模組根據該液壓感測裝置感測到的液體
