The invention discloses a campus floor intelligent protection system based on big data. The campus floor intelligent protection system comprises comprehensive feature identification equipment, physical action extraction equipment, fence stress detection equipment, danger mode analysis equipment, human body state detection equipment, a data processing center, a protection supporting mechanism and aprotective air cushion executing mechanism; the protection supporting mechanism comprises a middle protection device, a protective net and two side protection devices; the middle protection device comprises an extending frame, a U-shaped sliding plate, an electric telescopic rod and a positioning frame; and the side protection devices comprise positioning plates, sliding strips and transmission parts. According to the campus floor intelligent protection system based on the big data, by detecting behavior actions and facial expression of students at a fence and the thrust and pressure borne bythe fence, whether the behavior actions of the students are dangerous or not is judged, whether the students fall or not and falling positions are detected through the human body state detection equipment, the protection supporting mechanism or the protective air cushion executing mechanism is controlled to conduct protection, thus the safety of the falling students is ensured, and casualties arereduced.