The invention discloses an LED lamp heat dissipation device. The LED lamp heat dissipation device comprises a bottom disk, a lampshade, a lamp disk, a driver, a heat absorbing cover, a heat absorbing column and a heat removing device. An end opening of the bottom disk is movably connected with an end opening of the lampshade. The lamp disk and the driver are connected with the bottom disk through a magnetic column which is arranged on the inner wall of the bottom disk. The lamp disk surrounds the exterior of the driver, and a plurality of lamp beads are fixedly connected to the bottom of the lamp disk. The LED lamp heat dissipation device has the beneficial effects that by arranging the heat removing device, the heat in a lamp body is effectively dissipated; the lampshade is provided with a plurality of heat dissipation holes, the heat dissipation holes play a role in dissipating waste heat in the lamp body, the heat dissipation efficiency is improved, and the service life of the LED lamp is longer; the lampshade is additionally provided with a fluorescent band, the fluorescent band can absorb heat emitted by the lamp beads, residual light exists within a short time after the lamp is turned off, people can see after the lamp is turned off, and using is more convenient.