Method for improving simulation precision and speed of soil methane absorption amount

A method for improving simulation precision and speed of soil methane absorption amount is characterized by comprising the steps that firstly, driving data are obtained, secondly, the obtained driving data are substituted into an R99 model to simulate monthly scale data of the national soil methane absorption amount, and the optimal temperature interval of the R99 is obtained; thirdly, fitting the measured value according to the temperature sensitivity of 2.0 by using R99, and finally carrying out reverse deduction to obtain a new temperature response factor rT response curve; and finally, substituting the new temperature response factor rT into the R99 model to quickly obtain the high-precision methane absorption amount. According to the method, the temperature response curve of the temperature influence regulation factor in the R99 is adjusted by collecting the measured data of the site, so that the simulation effect of the improved model on the soil methane absorption amount of each ecological system withi