The invention relates to a rapid harmonic wave fundamental frequency search method of ground nuclear magnetic resonance data, and belongs to the field of ground nuclear magnetic resonance data processing. The method comprises that ground nuclear magnetic resonance data is collected and logged in; a power frequency harmonic wave dictionary including all possible fundamental frequencies is established according to the logged-in data; a self power spectrum density between the ground nuclear magnetic resonance data and each atom in the dictionary is calculated; a cross power spectrum density between the ground nuclear magnetic resonance data and each atom in the dictionary is calculated; an amplitude square correlation coefficient between the ground nuclear magnetic resonance data and each atom in the dictionary is calculated according to the self power spectrum density and the cross power spectrum density; and the amplitude square correlation coefficient corresponding to all atoms are summed, and the frequency of the atom corresponding to the maximum is the fundamental frequency of power-frequency harmonic waves. Thus, the method can be used to search power-frequency harmonic wave interference for the fundamental frequency in the ground nuclear magnetic resonance data efficiently and accurately, and the processing speed of the ground nuclear magnetic resonance data is improved greatly.