An LED purifying and energy-saving lamp comprises a lamp body, a heat radiator, a light source assembly and an air purifying device, wherein the lamp body comprises a main body portion, an overflow table and a plurality of connecting blocks; the heat radiator, the light source assembly and the air purifying device are provided in the main body portion; the air purifying device is provided above the heat radiator; the light source assembly is provided inside the heat radiator; the upper part of the main body portion is connected to the bottom edge of the overflow table via the plurality of connecting blocks; the main body portion, the overflow table and the connecting blocks define a plurality of air outlets; and a shunting spur is convexly provided at the bottom of the overflow table toward the interior of the main body portion.