The invention belongs to the technical field of fitness equipment, in particular to the independent suspension vibration damping mechanism of running platform of a treadmill. It solves the problem that the shock effect of the existing treadmill is poor and so on. It includes the chassis and the runway frame. The front end of mentioned runway frame is suspended on the chassis by means of a suspension structure and when the runway frame is subjected to a downward force and forcing the front end of the runway frame to descend, the suspension structure can assist the front end of the runway frame to rise and reset. The independent suspension vibration damping mechanism of running platform of the treadmill has the advantages: simple structure, good stability, good shock absorption effect, providing shock absorption buffer to multiple locations of the treadmill, long span life, and high mechanical strength.