Abstract: A line-scanning chromatic confocal sensor, including a line light source, a dispersion assembly, a receiving assembly, a slit and a processing assembly. The line light source is configured to output a continuous, uniform and broad-spectrum linear light beam. The dispersion assembly includes a first collimating element, a first dispersing element and a first focusing element. The receiving assembly includes a second focusing element, a second dispersing element and a second collimating element, and is arranged symmetrically with the dispersion assembly. The slit is configured to filter out component with a non-focusing wavelength from the reflected light. The processing assembly includes a third collimating element, a third dispersing element, a third focusing element and an image sensor.