The invention relates to an OLED lighting device installation structure and method for automobile tail lights. The OLED lighting device installation structure comprises an OLED installing support, OLED screens installed to the OLED installing support and an electronic control circuit connected to the OLED screens. The OLED lighting device installation structure is characterized in that clamping slots capable of enveloping and fixing the OLED screens are designed in the OLED installing support, the size of an opening of each clamping slot is larger than or equal to the size of the maximum cross section of each OLED screen to facilitate insertion of the OLED screen, after the OLED screens are inserted into the clamping slots of the OLED installing support, curing glue is injected via through holes formed in the back of the OLED installing support to have the OLED screens adhered and fixed to the installing support, and the electronic control circuit is formed on the surface of the installing support via laser ablation. Only the OLED screens need to be pressed into the OLED installing support, electrodes of the OLED screens and copper foil of the electronic control circuit are fixed through hot-pressing binding, FPC (flexible printed circuit) soft substrates used for connecting in the OLED screens and installation structure of the FPC soft substrates are omitted, the internal structure of lamps is simplified, and high use value is realized.