Abstract: The theory,and Experimental conditions of Rapid Scan Correlation Nuclear Magnetic Resonance (RSNMR) are illuminated in this paper. A rapid scan correlation method of the using reference signal processing to obtain undistorted slow passage spectra without the need for phase correction. The RSNMR spectral measurment is performed by experimental system of minicomputer and CWNMR spectrometer. The RSNMR technique is discussed in detail. The advantages and applications of the RSNMR are pointed out.