The invention relates to the technical field of alloy production, and particularly relates to a high-temperature precision alloy broadband strip and a production process thereof. The high-temperature precision alloy broadband strip comprises the following raw materials: 0.01% of C, 0.4% of Si, 0.2% of Mn, 0.015% of p, 0.01% of S, 0.2% of Ni, 0.01% of N, 20%-23% of Cr, 5.5%-7% of Al, 0.5%-1.5% of Mo, 0.1%-0.3% of Nb, 0.2%-0.6% of Co and the balance being Fe. The high-temperature precision alloy broadband strip is light in specific gravity, low in material consumption, and low in price, and is 1/3 of a nickel-based alloy material in price; according to the broadband strip disclosed by the invention, compared with an original production process, the yield is improved by 30-40%, and the production cost can be reduced by 30%-40%. The formula of the high-temperature precision alloy broadband strip is high in chrome and aluminum contents, so that the brittleness is easily generated; the machining deformation is difficultly carried out; the performance is changed by adding a middle alloy and rare-earth elements; the plasticity and the ductility are improved; and the difficulties in the production process are solved.