The invention relates to a sleeper conveying robot for rail mounting, including two substrates, travelling wheels, a loading device, a material placing device, a connection board and a support rack.The two substrates are arranged symmetrically on left and right sides. The travelling wheels are arranged at the lower ends of the substrates.Upper ends of the substrates are equipped with adjustingdevices, material placing devices is mounted on the upper ends of the adjusting devices, a support rack is mounted between the two substrates, a connecting plate is connected between the two materialplacing devices, and the connecting plate is a left-right telescopic structure. The invention can solve the problem of high labor cost existing in the transportation process of the existing sleeper, The utility model has the advantages of high labor intensity, low working efficiency, inconvenience to take out, poor flexibility of adjustment and easy collision, etc., and can realize the orderly transportation of the sleeper, and has the advantages of low labor cost, low labor intensity, high working efficiency, convenient taking out, flexible adjustment and not easy collision, etc.