Abstract: The content of carbon black in the drip irrigation belt was measured by thermogravimetry, and mass loss of each raw material in the drip irrigation belt was analyzed during the pyrolysis process. The preferred test parameters and conditions were obtained from the thermogravimetric method by comparison of the thermogravimetric results, which included a sample mass of about 10 mg and a nitrogen flow rate of 30 mL/min. Moreover, a step temperature elevation range were determined from room temperature to 500 ℃, holding at this temperature for 10 min and then to 900 ℃ at a heating rate of 20 ℃/min. There are several advantages for the thermogravimetric method, including strong operability, energy saving and environmental protection. However, there is a relatively large standard deviation in the test results of mass loss for the thermogravimetric method, resulting in relatively discrete test results.