The invention relates to a detection method of qualitative analysis of case drugs by utilizing a micro-nuclear magnetic resonance spectrometer. The detection method comprises the following steps of: establishing a standard hydrogen spectrum database of a 600MHz nuclear magnetic resonance spectrometer of common drugs; detecting case drugs by utilizing a 80MHz micro-nuclear magnetic resonance spectrometer to obtain a 80MHz experimental hydrogen spectrum; adjusting the chemical shift, the baseline and the characteristic peak of the 80MHz experimental hydrogen spectrum to an appropriate ratio to obtain a 80MHz treatment hydrogen spectrum of the case drugs; and referring to the chemical shift of a standard drug hydrogen spectrum of the 600MHz nuclear magnetic resonance spectrometer to analyze the 80MHz treatment hydrogen spectrum to obtain components of the case drugs and other detection results. The common drugs can be identified in the hydrogen spectrum by the characteristic peaks of a benzene ring and a methyl group, and the experimental results of drug component detection are consistent with those of the conventional method. The method provided by the invention has the advantages of simple operation, low cost, small occupied space and the like, and meanwhile, the matter structure can be analyzed and the novel drugs can be detected according to the hydrogen spectrum.