The invention belongs to the technical field of flammable gas explosion temperature measurement, and relates to an infrared test system of the explosion flame temperature of pipeline premixed gas. Theinfrared test system comprises a pipeline premixed gas configuration system, a pipeline explosion system and an infrared surface temperature collection system, wherein an infrared window is arrangedon the pipeline explosion system, the premixed gas configuration system comprises a premixed pipeline, a first branch and a second branch which are connected to the premixed pipeline in parallel, thepipeline explosion system with the infrared window comprises a high-heat energy igniter and a transparent high-pressure resistant organic glass pipeline, the right end of the organic glass pipeline issealed, the left end of the organic glass pipeline is open, a sealed PVC film is arranged at the opening of the left end of the organic glass pipeline, and the infrared surface temperature collectionsystem comprises a first temperature sensor, a photoelectric sensor, a second temperature sensor, a thermal infrared imager, a data collection card and a computer. According to the infrared test system, the interference of spurious signals can be effectively avoided, the dynamic surface temperature of explosion flame is accurately measured, the test method is simple, the sensitivity is high, andall data can be automatically collected and instantaneously transmitted and recorded.