An LED lighting device, comprises a first portion, comprising a lamp cap; a second portion, connected with the first portion, comprising a case and a power supply, and the power supply is disposed in the case; and a third portion, connected with the second portion, comprising a heat exchange unit and a light emission unit connected with each other, and the light emission unit and the power supply are electrically connected. A distance b from a junction face of the first portion and the second portion to a plane where a center of gravity of the LED lighting device is located satisfies:

(L2+L3)/5