The invention discloses an electric vehicle battery which is characterized by comprising an aluminum shell internally provided with soft bag lithium iron phosphate batteries. The interior of the aluminum shell has an aluminum bracket structure and is divided into ten cells, and each cell is internally provided with ten flaky soft bag lithium iron phosphate batteries. Insulating reinforced paper is wrapped outside each lithium iron phosphate battery, and the upper ends and the lower ends of the lithium iron phosphate batteries are fixed in each cell in the aluminum shell. The positive pole and the negative pole of each lithium iron phosphate battery collect current by a copper billet and output the current through a connection column, wherein an insulator on the periphery of the connection column is fixed on an upper cover of the aluminum shell, and the periphery of the connection column is provided with an inner nut convenient for the parallel connection and the series connection of battery units. The soft bag lithium iron phosphate battery is a battery unit of 3.2V and 200AH, which is assembled by parallel connection of ten single lithium iron phosphate batteries of 3.2V and 200AH. The invention has the advantages of high efficiency, good performance, long service life, low cost and no environmental pollution.