Control circuit for LED car lamp

The invention relates to a LED car lamp control circuit comprising a LED car lamp assembly which includes several LEDs, at least one reflecting unit and at least one heat elimination unit; a driving circuit for controlling the LED to keep a stable brightness, chrominance and color temperature by controlling the input magnitude of the LED driving current; and a temperature sensing circuit for sensing the temperature of a certain measuring point of the LED car lamp assembly, and triggers the driving circuit to execute the action of output driving current magnitude correction by electronic signal as soon as the temperature reaches a preset value. Consequently, the invention can realize the even brightness, stable temperature of the LED, thereby avoids the damage to the LED caused by extra high temperature and avoids the changed brightness, chrominance and color temperature of the LED out of the criterion of relative car lamp controlling laws, consequently, can prolongs the service life of the LED.