A terahertz endoscope suitable for intestinal tract lesion inspection and an inspection method are provided. The terahertz endoscope includes a combined tube body inserted into an intestinal tract, a terahertz signal enhancement module, a terahertz inspection module, and a real-time imaging module. The combined tube body mainly includes a sleeve tube (6), a sleeve head (7) and a hemispherical glass cover (8). The terahertz signal enhancement module mainly includes a tunable laser (2) and an optical fiber (9) installed in the sleeve tube (6). The terahertz inspection module mainly includes a terahertz wave detector (4), a terahertz wave transmitter (5), as well as a first stainless steel metal wire (12) and a second stainless steel metal wire (13) installed in the combined tube body. The real-time imaging module mainly includes an image processing and transmitting circuit board (3), as well as a power line (10), a video signal line (11), an LED cold flight source (14), and a COMS camera (15) installed in the combined tube body. The terahertz endoscope and inspection method could be used for accurate inspection of intestinal tract lesions in early stage, thereby improving the inspection accuracy and sensitivity. The terahertz endoscope is capable of obtaining rich information, and has a compact structure, easy operation and wide applicability.
