Diagnosis of combustion field was mainly useful to structure designing and combustion state organization of the combustion chamber. Laser schlieren/shadow and difference interferometer were used to study the wave structures of combustion field. And combustion border and combustion violent region were diagnosed by the planar laser-induced fluorescence of OH groups (OH-PLIF) method to get a clear field of combustion wave lines and the combustion results displaying by PLIF. Combining laser shadow/difference interferometer and OH-PLIF, the relationship between the wave lines and combustion could be seen. To cut the image of light source similarly to traditional schlieren by adopting a new laser schlieren technology, which produced not obvious laser speckle and diffraction phenomenon. What′s more, it was meaning to display the wave structure and diagnosis by PLIF at the same time. The work above can be a reference for the study of supersonic combustion fluid field.