Abstract: The wood meals of Salix psammophila, Caragana intermedia are liquefied with phenol respectively using sulfuric acid as catalyst inheated oil bath. The liquefied resultants of S.psammophila and C.intermedia are measured and analyzed comparatively by NMR spectra. The results show:during liquefaction of S.psammophila and C.intermedia wood under acidic conditions, degradation and polycondensation reaction arehappened simultaneously, and the main liquefied products are β-D-glucose, coni-feryl alcohol, aromatic nucleus proton, and the guaiacyl group of lignin structure. From 1HNMR, peak areas of S.psammophila liquefied product contain more average number of protons than C.intermedia liquefaction product. In 13CNMR analysis, their chemical shift positions are similar basically, only the spectral intensity of S.psammophila liquefied product is slightly larger.