Abstract: Faced with the(111) physical layout of NIM5 fountain clock,cooling laser must be injected with an inclined angle.Adapted to this requirement,an integrated cooling laser injecting system is designed to control the characters of laser beam,such as power,polarization and quality.Relevant method of adjustment is introduced to realize the specifications.Results of adjustment reached power available higher than 86%,with power stability better than 97%;verticality lower than 0.3';uniformity better than 4%,and collimation better than 3%.