The reflection property of the micro cutting cube corner prism film with ultrahigh retroreflection is analyzed theoretically by the method of geometrical optics, and verified by optical simulation software. The principle of the ultrahigh retroreflection property was illustrated and compared with the traditional micro cube corner prism film. Results indicate that, parallel light can be totally retroreflected if perpendicularly striking the bottom of the micro cutting cube corner prism unit and ignoring optical absorption of materials, while the retroreflectivity of the traditional micro cube corner prism unit is 66.7%. The simulation retroreflectivity of this two type films are 92.3% and 62.4% respectively. The retroreflection measuring method for film is established and the reflectivities of two type films abovementioned are measured which are 67.8% and 39.5% respectively.