Abstract: A treadmill running platform structure is provided, which includes a running platform, a running board, and a running belt. The running board includes two soft elastic strips adapted to two side bars of the running platform, a plurality of rigid support strips provided between the soft elastic strips, and strip-shaped connection plates respectively connected to two ends of the rigid support strips. Two strip-shaped connection plates are connected above the rigid support strips, and the strip-shaped connection plates are respectively fixed to a corresponding end of each rigid support strip. The present disclosure can achieve buffering of the entire running board, especially by connecting the rigid support strips together through the strip-shaped connection plates, thereby avoiding an uneven transition of the rigid support strips when a runner steps on the running board, improving the comfort of the runner's feet, and reducing the noise of the treadmill.