Star formation region is the best astrophysical laboratory for the studies of the physical processes in the formation of stars. The Orion Molecular Cloud Complex is one of the most famous regions to study the formation of stars with different masses, and to reveal the properties of the corresponding young stars. The kinematic and chemical properties of the warm ionized gas of the star forming regions can be obtained by the analysis of their optical spectra. Using the spectroscopic data from the Chinese large astronomical facility Guoshoujing Telescope (also called LAMOST), we have selected eight plates which target the Orion Molecular Cloud Complex. 1,300 spectra from these plates are overlapping with the diffuse ionized gas of the Orion Molecular Cloud Complex. We re-constructed the super-sky spectra with the spectra from the uncontaminated sky fibers for the following sky subtraction. The central wavelength and integrated flux of several emission lines, such as the Ha, [N Ⅱ]λ 6584, [S Ⅱ]λλ 6717 and 6731, are then calculated. Finally we present maps of radial velocities and line intensity ratios covering the diffuse ionized medium in the Orion Molecular Cloud Complex.