The utility model relates to a thermal parameter inversion measuring device based on an infrared thermal imager, and belongs to the technical field of thermal physical property test. The device aims to solve the problem that the existing thermal parameter inversion measurement is affected by noise and has large error. The measuring device comprises an insulation device, a fastening and supporting device and a collecting and processing device. The insulation device is used for heating and insulating a test sample; the fastening and supporting device is used for adjusting the tightness of the insulation device and the test sample; a side face of the test sample is drilled with a plurality of small holes, based on approximation blackbody radiation temperature measurement principle, these small holes become blackbody cavities with effective emission rate close to 1. The collecting and processing device employs the infrared thermal imager to conduct non-contact acquisition on the temperature of small holes on the test sample, and processes the collected information, so as to inverse thermal parameters. The collecting and processing device uses a conjugate gradient method to inverse the thermal parameters. The device is used for thermal parameter inversion.