The invention belongs to the technical field of detecting devices of railway wheels, and in particular relates to a telescopic type probe carrier. The telescopic type probe carrier comprises a probe which is fixed on the probe carrier. The telescopic type probe carrier has the advantages of reasonable design, convenient use, debugging and maintenance and high detection coverage rate and accuracy, saves large quantities of manpower, material resources and detection time expensed by the drop type ultrasonic flaw detection, and guarantees the traffic safety of the railway.