A method of purifying salt lake lithium ore and recovering fluorine-containing lithium carbonate was mainly described.The process flow was as follows：the salt lake lithium ore（fluorine-containing lithium carbonate） was washed by water to remove most of the soluble impurities contained in it,and then it was put into the lime milk slurry for heating to 90~95 ℃ according to a certain proportion.Then it was filtered to obtain the lithium hydroxide solution after 4 h of reaction.The lithium hydroxide solution was pressurized and concentrated at 100~120 ℃ for 4 h to obtain lithium hydroxide solution with low content of calcium-and-magnesium ions and silicate.Food grade carbon dioxide was passed into the refined lithium hydroxide solution and the industrial-grade lithium carbonate was obtained,or preparing lithium hydroxide by concentration.The lithium hydroxide obtained by procedures above can be used to obtain high-purity lithium carbonate with silicon content less than 10×10^-6 through secondary carbonization,cation exchange resin to remove calcium and magnesium ions and recrystallization.The lithium hydroxide can also be used to obtain lithium hydroxide monohydrate with calcium content less than 5×10^-6and magnesium content less than 2×10^-6 through concentration.