NOVELTY - A lithium carbonate modified cerium barium zirconate proton conductor material preparation method involves weighing raw material comprising barium nitrate, zirconium nitrate pentahydrate, cerium nitrate hexahydrate and yttrium nitrate hexahydrate according to barium-cerium-zirconium-yttrium oxide followed by obtaining viscous colloid and light yellow pure barium-cerium-zirconium-yttrium oxide-delta powder. The powder is mixed with lithium carbonate and anhydrous alcohol. The obtained mixture is dried, grinded, sieved and cooled to obtain a conductor material.    USE - Method for preparing a lithium carbonate modified cerium barium zirconate proton conductor material.    ADVANTAGE - The method enables preparing a lithium carbonate modified cerium barium zirconate proton conductor material with high conductivity, in a simple, inexpensive and time-saving manner, and providing foundation for low temperature development of solid oxide fuel cells.    DETAILED DESCRIPTION - A lithium carbonate modified cerium barium zirconate proton conductor material preparation method involves weighing raw material comprising barium nitrate, zirconium nitrate pentahydrate, cerium nitrate hexahydrate and yttrium nitrate hexahydrate according to barium-cerium-zirconium-yttrium oxide (BaCe(0.7)Zr(0.1)Y(0.2)O(3-8)), and utilizing metal salt, EDTA and nitric acid at a mol ratio of 1:1.5:1 to 1:2:1. 500 ml deionized water is added to the raw material, and pH of concentrated ammonia water is adjusted to 6-8. The obtained mixture is heated, stirred and evaporated to obtain viscous colloid. The viscous colloid is placed in a stainless steel reaction container and pre-burned at 240 degrees C for 5 hours. The burned colloid is calcined at 1000-1100 degrees C for 5 hours to obtain light yellow pure barium-cerium-zirconium-yttrium oxide-delta powder. The powder is mixed with 0-7.5 mass% lithium carbonate and 0-4 mass% anhydrous alcohol. The obtained mixture is dried, grinded, sieved and molded at 1150-1300 degrees C for 4-6 hours. The molded mixture is cooled at room temperature to obtain lithium carbonate modified cerium barium zirconate proton conductor material.