Contactless measurement of wind flow has been utilized in many fields,such as weather forecasting,hurricane tracking,and aeronautic alarm.In this paper,a novel multi-laser beams measuring system(MLBM) for high precision detection of wind field based on optical scintillations and small perturbation theory was proposed and verified.According to the fluctuation intensity of laser backscatter received by two detectors,peak delay technique was adopted to determine the velocity of wind flow.Detailed procedure to deal with backscatter signals was also presented.Then,practical experiments and measurement results showed high precision of the proposed system for wind measurement with a relative error as 3.21%.Consequently,the MLBM system possesses obvious potential application in engineering project. Contactless measurement of wind flow has been utilized in many fields, such as weather forecasting, hurricane tracking, and aeronautic alarm.In this paper, a novel multi-laser beams measuring system (MLBM) for high precision detection of wind field based on optical scintillations and small perturbation theory was proposed and verified. According to the fluctuation intensity of laser backscatter received by two detectors, peak delay technique was adopted to determine the velocity of wind flow. Detailed procedure to deal with backscatter signals was also presented.Then, practical experiments and measurement results showed high precision of the proposed system for wind measurement with a relative error as 3.21%. Conclusion, the MLBM system possesses obvious potential application in engineering project.