The invention relates to an electrostatic precipitator of an efficient dust collecting electrode, comprising a shell which is provided with an airflow inlet and an airflow outlet. A discharge electrode and a dust collecting electrode are arranged in the shell. Wherein, the dust collecting electrode comprises a hollowed-out metal shell, and a dust collecting plate or a dust collecting sphere or an alveolar porous plate which is filled in the shell and manufactured by porous metallic foams or porous foam plastics processed via conductive treatment, and the dust collecting plate or the dust collecting sphere moves between an integration chamber and a dust cleaning chamber. The electrostatic precipitator of the efficient dust collecting electrode of the invention selects the porous metallic foams or the porous foam plastics processed conductive treatment, to manufacture a flat type, a granular type or an alveolar porous type to fill in the shell of a metal framework or a reticular formation to manufacture the dust collecting electrode with different structures such as rotary type, flat brattice type, circular flow type and so on, and at the same time separates a dust collecting area and a dust cleaning area to make dust collection efficiency of the electrostatic precipitator reach to more than 99.99%. The dust collecting electrode of the invention is particularly applicable to the last stage of the electrostatic precipitator, wherein, after dust abatement, dust content of the gas per cubic meter is less than or equal to 10mg.