To achieve high-precision， non-contact wave height measurements， a non-contact wave height measurement method based on laser-incoming spot recognition was proposed. First， the image geometry model of the wave height measurement device was constructed， and the primary parameter determination method of the wave height measurement device was studied. Then， according to the characteristics of the binary image of a laser in water， a laser-water entry feature template was constructed， and a dynamic laser spot tracking algorithm was proposed. Finally， according to the determined structural and image sensor parameters， an experimental device was constructed， the wave-height sensor was rated， and the wave simulated by the electric displacement platform was measured using the calibration curve. The experimental results show that the measured displacement is identical to the set displacement of the electric displacement platform， with a maximum error of only 0.65 mm， essentially meeting the high precision， non-contact， and high dynamic measurement requirements of hydro-physical model experiment waves.