The distributions of premixed combustion parameters and the flame stru ctures are investigated using deflection tomography.A projection sampling system for defle ction tomography is presented to obtain the chronological arrays of Moiré fringe patterns.Deflecto grams at six view angles are captured synchronously in the same optical path condition using only a pair of gratings.This kind of apparatus is suitable for the tomographic measurement of the transient flow field.Hybrid regularization method for deflection tomography is introduced to reconstruct th e two-dimensional temperature distribution of the premixed combustion.The experimental investigat ion is performed using a premixed flame by burning a mixture of C₄H₁₀ and air.The samplin g system is used to obtain six orientation Moiré fringes.150fringes in total are processed and temperature distributions in 20cross sections are reconstructed from projection data in different moments usi ng hybrid regularization method. The reconstruction result is in an average error of ~5% when compared with the thermocouple measurement.The Sobel operator is applied to the threshold segmentation of tw o-dimensional temperature distributions.Visualization tool kit with the marching cube and ray casting algorithms is employed to reconstruct the flow structure.The experiment results demonstrate t hree-dimensional dynamic visualization of the temperature distributions and the flame structures of a pre mixed combustion.