An LED lamp structure for an automobile comprises a lamp column, a radiator, a fan, a left LED light source plate and a right LED light source plate and further comprises a left LED light source positioning block and a right LED light source positioning block, wherein the lamp column is provided with a light source plate positioning block bearing disk, an installation clamping base and a radiator connector; the radiator is provided with a radiator cavity; the fan is arranged in the radiator cavity; one side of the left LED light source plate positioning block is provided with a left LED light source plate positioning block ventilation cavity, and one side of the right LED light source plate positioning block is provided with a right LED light source plate positioning block ventilation cavity; the left side and the right side of the lamp column are provided with a left LED light source plate matched cavity and a right LED light source plate matched cavity correspondingly, the left LED light source plate is matched with the left LED light source plate matched cavity, and the right LED light source plate is matched with the right LED light source plate matched cavity; and the distance from the top surface of a light baffle disk of the lamp column to the upper surface of an installation base is 41.9 mm+/-0.1 mm, the distances from the bottom plane of a left LED light source and a right LED light source to the upper surface of the installation base are 25mm +/-0.2 mm, and the distance from the front side face of the lamp column to the rear side face of the lamp column is 14 mm+/-0.1 mm. The heat dissipation rate is increased. The structure is simple, the size is small, and the heat transferring effect is good.