Abstract: Tomographic Particle Image Velocimetry (Tomo-PIV) is an instantaneous three-dimensional velocity measurement technology which can provide detailed data support for complex flows with strong unsteady characteristics. A general review of the development and application of the technology at home and abroad is presented. The principle and characteristics of tomographic particle image velocimetry are introduced, and the current research situation is discussed, including especially the camera layout, particle density, calibration mapping function and 3D reconstruction algorithm. Then the typical application of Tomographic Particle Image Velocimetry is introduced, showing its advantages in the unsteady three-dimensional flow measurement and engineering applications. Finally, the application prospect and development trend of tomographic particle image velocimetry are discussed.