Purpose of salvianolic acid A freeze-dried powder injection for preparing medicine for inhibiting brain tissue neuron damage or death

The invention relates to a purpose of a salvianolic acid A freeze-dried powder injection for preparing a medicine for inhibiting brain tissue neuron damage or death. The salvianolic acid A freeze-dried powder injection comprises the following components in weight ratio: 10-80 g of main ingredient containing salvianolic acid A, 10-80 g of filler, and 0.01-0.2% of antioxidizer, wherein the filler is any one or more selected from mannitol, glucose and lactose; the antioxidizer is any one or more selected from vitamin C, thiourea, sodium hydrogen sulphite and sodium pyrosulfite; the content of the salvianolic acid A in the main ingredient containing salvianolic acid A is more than 93% and less than 100%; and the salvianolic acid A freeze-dried powder injection further comprises other four components: 0.1-2% of alkannic acid, 0.1-2% of rosmarinic acid, 0.1-2% of salvianolic acid B, and 0.1-2% of salvianolic acid C.