The near stalk interference of laser could result in the phenomena of Laser Newton's Ring which can be regarded as the linear basis of high precision, long distance collimation-checking because of its prominent merits such as steady facula, linear transmitting and so on. There will be a comprehensive application future of Laser Newton's Rings in such places as detecting of dam deformation, collimation-checking of the track and guidance of high precision in production lines. Here, a new collimation-checking system which is based on Laser Newton's Ring is implemented. Finally, an experiment is performed as well as an ideal result shown.