A method for reducing contact resistance based on a metal with a low melting point and an oxide thereof. Conductive paste, i.e. the metal with a low melting point and the oxide thereof are applied between electric connectors which are mechanically connected, wherein the oxide accounts for 0.05-50% of the total weight of the conductive paste; the metal with a low melting point is selected from one of or a combination of any two or more of sodium, potassium, lithium, rubidium, cesium, gallium, indium, mercury, lead bismuth alloy, gallium-base binary alloy, gallium-base complex alloy, indium-base alloy, bismuth-base alloy, mercury-base alloy and sodium-potassium alloy, of which the melting points are lower than 200°C. Using a mixture of the metal with a low melting point and the oxide thereof as a conducting medium, the method can effectively reduce the contact resistance between the metal electric connectors which are mechanically connected, reduce the heat effect of the contact resistance, improve the transmission efficiency of electric energy, and prolong the service life of equipment, and can be applied to the technical field of electric power and energy resources.