The invention discloses a positive electrode material of a liquid or semi-liquid metal battery, a preparation method and application thereof, and belongs to the field of electrode materials of energy storage batteries. The present invention adopts metal Ga or Ga alloy formed by one or more elements of Sb, Bi, Sn, Pb as the positive electrode material, which can be combined with existing negative electrode materials (Li, Na, K, Ca, Mg) It is alloyed and has good electrochemical properties. The melting point of metal Ga is extremely low (29.8 ℃), and the preparation process of Ga alloy is simple. Using Ga or Ga alloy for liquid or semi-liquid metal batteries can maintain the advantages of high capacity and long life of liquid or semi-liquid metal batteries. It can reduce the working temperature of the battery, reduce the polarization of the battery, increase or stabilize the discharge voltage of the battery, and improve the charge and discharge performance of the battery under high current density.