Non-equilibrium atmospheric pressure plasma has a wide range of applications in the fields of surface modification and sterilization. In order to enhance the understanding of its physical mechanism

the measurement of key parameters such as electron density and temperature

gas dynamics temperature and molecular rotation temperature is essential. Laser scattering is a common technique for measuring these parameters. This paper will give a detailed review of laser scattering diagnosis in non-equilibrium atmospheric pressure plasma diagnosis. First

three types of laser scattering

namely

Rayleigh scattering

Thomson scattering and Raman scattering

are introduced. And the corresponding calculation formulas are derived. Then

the three kinds of scattering diagnosis strategies that have been reported so far

namely

three grating spectrometers

Bragg grating filter and physical mask combined with a single spectrometer structure

are summarized and categorized. The advantages and disadvantages of these three diagnostic strategies are analyzed. The research results of the application of scattering diagnostics in non-equilibrium atmospheric pressure plasma in recent years are analyzed and discussed

and the research direction of laser scattering is discussed. Based on this

the core technical issues for successful diagnosis of laser scattering in atmospheric non-equilibrium plasma are discussed

which has certain guiding significance for expanding the application scope of laser scattering in plasma diagnosis.