The invention relates to a high-sensitivity strip drift detection device based on an array infrared technology. The high-sensitivity strip drift detection device comprises an infrared emission device, an infrared receiving device and auxiliary calibrating devices, wherein the infrared emission device and the infrared receiving device are fixed at the two ends of an edge of a conveyed strip respectively; the fixing positions of the infrared emission device and the infrared receiving device correspond to each other; and the auxiliary calibrating devices are positioned on the two sides of each of the infrared emission device and the infrared receiving device. Due to the introduction of the infrared calibrating devices, the mounting process is simple and easy to implement, the calibrating operation is simple, convenient and intuitive, and the working load and the working strength for mounting and calibrating are greatly reduced; due to the introduction of a differential array, the measurement resolution ratio, the response speed and the sensitivity level of a system can be greatly increased with lower cost; and a pulse drive unit based on a complex frequency is designed in the infrared emission device, and an automatic gain control AGC unit is introduced into the infrared receiving device, so that the robustness, the reliability, the stability, the precision, the sensitivity and the anti-jamming capability of the device are greatly improved and the purpose of zero drift is achieved.