The utility model provides a real-time monitoring and analyzing device based on a near infrared spectrum. The real-time monitoring and analyzing device comprises a spectrum collection front end probe, a light source, a spectrometer and an embedded type control and processing system, and is characterized in that the spectrum collection front end probe is right opposite and fixed to one side of a flap receiving area and collects a near infrared reflection spectrum of the flap receiving area, the spectrometer, the light source and the embedded type control and processing system are arranged in a shell, a power supply is arranged in the shell, and the embedded type control and processing system is connected with a displayer embedded in the shell. The embedded type control and processing system conducts data analysis on spectrum information collected by the spectrometer in real time according to the flap post-operation physical index database running analysis algorithm so as to judge the blood supply situation of the flap receiving area, whether infection happens or not and the like, the situation is found as early as possible, doctors are informed to conduct treatment as early as possible, the operation success rate is increased, the medical care cost is reduced, and the requirement for medical staff is lowered.