Three-dimensional contour measuring device and method based on three-color laser

The invention discloses a three-dimensional contour measuring device and method based on three-color laser, the device comprises a light source assembly, a beam combining assembly, an output assembly, a color imaging sensor and a data processing module, and the data processing module is connected with the color imaging sensor; the first laser is used for outputting first-color laser, the second laser is used for outputting second-color laser, the third laser is used for outputting third-color laser, and the first-color laser, the second-color laser and the third-color laser are combined into three-color laser through the beam combining assembly and then transmitted to the output assembly. The output assembly modulates the three-color laser into linear laser and outputs the linear laser to a to-be-measured object; light reflected by the object to be measured enters the color imaging sensor, and the data processing module obtains height information and color information of the object to be measured according to