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A Rare earth resistance slurry for a rare earth thick-film circuit based on a metal substrate and producing process thereof, the slurry is composed of a function phase and an organic carrier in wt ratio of (65-85) : (35-15). The function phase consists of an Ag-Pd-Y compound powder and a microcrystal glass powder in wt ratio of (75-55) : (25-45). The weight ratio of Ag, Pd and Y in the Ag-Pd-Y compound powder is (75-59) : (15-40.5) : (10-0.5). Its producing process includes following steps : (1) preparing the microcrystal glass powder→(2) preparing the Ag-Pd-Y compound powder→(3) preparing the organic solvent carrier→(4) preparing the rare earth slurry. The slurry is in use of ferrite-based stainless steel substrate.