Lithium metal battery plays an important role in the field of battery. The preparation and assembly of lithium metal battery materials also play an important role in lithium metal batteries. Through the introduction of the working principle of lithium-ion battery, the positive material, negative material and electrolyte in the structure of lithium-ion battery are analyzed. After describing the types, advantages and disadvantages of battery materials, the preparation method of lithium metal composite electrode, the assembly of button battery and the electrochemical test are discussed. Under the premise of doing a good job at present, it is essential to go on better and faster development and innovation.