The invention discloses a method for detecting the heat coking trend of inferior heavy oil through adopting infrared spectroscopy. The method comprises the following steps: 1, collecting an inferior heavy oil sample, determining the heat coking index of the inferior heavy oil sample, and establishing the heat coking index variable of the inferior heavy oil sample; 2, determining the infrared spectrum of an inferior heavy oil sample for correction at a temperature, taking the absorbance in a characteristic spectral region to form a spectrum variable, and fitting the spectrum variable and the heat coking index variable to establish a correction model; and 3, determining the infrared spectrum of an inferior heavy oil sample to be detected at the temperature under conditions same to conditions adopted in the determination process of the inferior heavy oil sample for correction, taking the absorbance in the characteristic spectral region, and substituting the absorbance into the correction model to obtain the heat coking index of the inferior heavy oil sample to be detected. The method has the advantages of fast operation and high accuracy.