The invention relates to the technical field of analysis test, and in particular relates to a method for simultaneously determining content of phosphorus, magnesium, iron, aluminum, silicon, calcium, titanium, manganese and strontium in phosphorite by adopting inductively coupled plasma atomic emission spectrometry (ICP-AES). Specifically, lithium metaborate is a non-oxidant solvent with a high melt point, has high decomposition capacity for a majority of test samples, and can effectively decompose rocks and minerals difficult to dissolve. The method comprises the following steps: placing a phosphorite test sample into a platinum crucible, adding the lithium metaborate solvent and a lithium bromide releasing agent, melting and decomposing the phosphorite sample by using a high-frequency sample melting machine, pouring in a polytetrafluoroethylene beaker with 10 percent nitric acid at a high temperature by virtue of a magnetic stirrer, after the primary sample melting acidification sizing, performing matrix matching by adopting a national grade-I phosphorite, establishing a standard curve by adopting a Yttrium internal standard method, and determining the content of phosphorus pentoxide, magnesium oxide, iron oxide, aluminum oxide, silicon dioxide, calcium oxide, titanium oxide, manganese oxide and strontium oxide in the phosphorite by adopting the ICP-AES. The method has the advantages of rapidness, convenience and accuracy, and is particularly suitable for batch determining the phosphorite samples.