The invention discloses an automobile lamp detection instrument based on a photoresistor array. The automobile lamp detection instrument is used for realizing reliable lamplight and low-cost detection of an automobile. The automobile lamp detection instrument based on the photoresistor array mainly comprises a detection chamber (1) and photoresistors (2); one group of photoresistors (2) penetrate into a group of round through holes formed in the surface of an inner steel plate of the detection chamber (1) so as to be in interference fixed connection with the inner steel plate of the detection chamber (1). The automobile lamp detection instrument based on the photoresistor array is simple in structure, high in detection precision, simple and convenient to operate, easy to install, relatively low in cost and reliable in performance.