Terahertz wave imaging system

The invention discloses a terahertz wave imaging system. Large-range two-dimensional multi-column scanning on the measured objected is realized by swinging a frame scanning plane mirror in the small-angle range, so the scanning imaging speed is increased, and the practicability of the system for scanning and imaging a human body in a real-time security check system is improved; the swinging range of the frame scanning plane mirror is small, so the stability of the whole system is improved and the imaging quality is improved; the measured object is irradiated by a terahertz radiation source, so that the imaging capability and the imaging quality of the system are improved; and a data receiving processing device corrects the image by using factors 1/cos beta, so that image distortion during acquisition is avoided and the imaging quality is improved.