The tunable diode laser absorption spectroscopy(TDLAS)technology based on double spectrum has the advantages of high accuracy and fast response speed.It is often used in the temperature measurement of combustion field and explosion field.However,in the test,it is easy to be affected by the environment and other factors resulting in large test errors.In this paper,based on the dual line absorption spectroscopy technology,water molecule absorption spectra with wave numbers of 7182.94962cm -1 and 7179.7524cm -1 were selected,and a rapid temperature test system with a test period of 500 μs was developed.Relevant research was carried out on the temperature measurement technology in the furnace.The experimental results show that the temperature error directly calculated by the double spectral line is relatively large.Taking the environmental factors and the interference factors of adjacent spectral lines into consideration,the temperature calculation results are corrected accordingly.After correction,the accuracy of temperature measurement is greatly improved；the error is about 5%.Therefore,and the test scheme and the temperature measurement system have relatively high accuracy,which lays the foundation for the subsequent research on transient temperature field testing techniques such as combustion and explosion.