There are some effects on near infrared analysis result caused by the type of near infrared spectrometer and working parameters settings. How the different spectral resolution on Fourier transform spectrometer impact quantitative NIR model of edible oil was discussed in this paper. The experiment collected near infrared spectrum of 60 edible oil samples using Vertex 70 spectrometer, in three kinds of spectral resolution (4, 8, 16cm-1) conditions, by the transmission type liquid optical fiber probe. Monte Carlo sampling method was used to analysis three groups of near infrared spectral sample set and eliminate the abnormal samples. The calibration set and validation set were divided according to Kennard-Stone method. The quantitative models of palm acid were established, optimized and validated. Experiments shown that the model built based on 16cm-1 had better performance than 4cm-1 and 8cm-1. The results can provided a reference spectral resolution while detecting uniform liquid by near infrared technology.