The company has developed an automatic lifting device for railway wheel online detection probe array, which is characterized by including a support base, the support base includes a base, a limit rod and a pulley respectively arranged on the base; The outlet rod is connected with the sliding plate, and the bottom of the sliding plate is in contact with the rolling wheel; the pulley is located between the sliding plate and the support seat; the upper part of the support plate is placed with an array of probes for detection, and the support plate and the support seat are connected by a limit rod. The utility model relates to an automatic lifting device for detecting probe arrays of railway locomotive wheels on-line. The device has good stability and reliability, and is easy to replace and maintain.