The invention relates to a method for identifying thin-reservoir subtle lithologic oil and gas reservoir, belonging to the technical field of petroleum exploration and development. The method disclosed by the invention comprises the following steps: calculating a quality factor of the stratum, and performing secondary high-frequency compensation on the post-stack seismic data by utilizing inverse Q filtering according to the quality factor so as to acquire ideal seismic data; performing seismic response feature research on target stratum according to the ideal seismic data, clearing the reservoir waveform features, and making a seismic data skeleton section according to the waveform reflection characters on the top and bottom surfaces of the reservoir; and finely depicting surface distribution of a sand body on the basis of the seismic data skeleton section, determining the boundary of the sand body by utilizing seismic attribution analysis so as to determine the thin-reservoir subtle lithologic oil and gas reservoir. According to the method disclosed by the invention, proved by specific examples, the subtle lithologic oil and gas reservoir can be reliably identified, and the heating identification rate of the thin-reservoir subtle lithologic oil and gas reservoir is improved.