The invention discloses an automatic diagnosis and treatment device and method for a levator scapulae injury based on 
modal coordinates. The device comprises a three-dimensional scanning device, a micro-scalpel, an image displaying module, a 
hydraulic control module, a 
cutting edge direction control module and a 
control system; firstly, the three-dimensional scanning device conducts three-dimensional scanning on the 
trapezius muscle tissue to be detected and transmits a result to the 
control system, and the coordinates of all preset points before and after the injury occurs are obtained after 
processing; secondly, the micro-scalpel is controlled to work by the 
hydraulic control module and the 
cutting edge direction control module, and the scanning situations and the working situations are displayed in the image displaying module in real time. According to the automatic diagnosis and treatment device and method for the levator scapulae injury based on the 
modal coordinates, firstly, by conducting three-dimensional scanning on the 
trapezius muscle of the 
human body, the digitized 
modal coordinates of the 
trapezius muscle are established; secondly, three-dimensional meshing is conducted on the trapezius 
muscle, the curvatures of the preset points when 
lesion does not occur on the trapezius 
muscle are calculated, and the location of the 
lesion on the trapezius 
muscle is determined; finally, automatic diagnosis and treatment are conducted. Thus, the automatic diagnosis and treatment of the levator scapulae injury are quickly and efficiently achieved.