The invention relates to an aluminum alloy hub gravity casting side die hot spot cooling point seeking device. According to positions of cooling holes required by a side die and a bridging principle, the point seeking device is simple in structure and convenient to operate, and by a square groove design of a main rod 8, vertical movement of a vertical connection rod is realized, and adaptability to different hub dies is realized. Left and right locking blocks 15 adjustable in distance are further arranged at two ends of a right-angle gauge respectively, and owing to threads of the locking blocks, stability of the device in a point seeking process is improved, and simplicity and convenience in operation are further improved. The problem of difficulty in point seeking is solved, procedures are simplified while hole position precision is guaranteed, and operation efficiency is effectively improved.