According to the analysis of collimating misalignment of optic-fiber collimator,that is the coupling efficiencies in abaxial,angular shift,distance coupling and angular shift have the most effect in coupling efficiency. Spot position varied regularly as long as the temperature varied periodically during the experiment. Figured out by the position shifts of light spot in experiments,the angular shifts of saddle and arch clips during temperature cycles were 519 μrad and 395 μrad,and thus led to coupling lost of 0.944 dB and 0.718 dB;the angular shifts of saddle and arch clips during temperature shocks were 986 μrad and 138 μrad,and thus led to coupling lost of 1.793 dB and 0.251 dB. The result of the experiments demonstrated that arch clip is better than saddle clip in both situations of temperature variation.