The invention relates to a multidimensional joint nonuniformity correction method for an infrared imaging system, which belongs to the technical field of infrared imaging. Multidimensional informationis obtained through different temperature and different integration time of a reference radiation source, a correction parameter is calculated for nonuniformity adaptive correction for working of theinfrared imaging system under different integration time. An image through actual target acquisition is subjected to base image deduction before correction, offset errors are eliminated automaticallyin real time, the imaging system does not need to use devices such as a shutter and a shield, and the nonuniformity can be effectively corrected under different environment and bias voltage conditions. The method requires less storage capacity and less computation, and is easy to be implemented by hardware. Moreover, only a set of correction parameters can be used to complete correction on targetimaging with different integration time, which has engineering practicability.