the yd - 22 type hydraulic tamping machine, is my factory wide set of users at home and abroad to experience the use of tamping machine, using new material, new technology has developed in the upgrading of products. the basic structure and principle of still retain the advantages of the old tamping machine, double column frame, cylinder lifting way. at the same time through increasing the pickaxe palm penetration depth, and by increasing the guide post stroke limiting device and method, which not only in the domestic type ⅱ, ⅲ concrete sleeper line of tamping, also can be in various foreign concrete sleeper and sleeper line of tamping. the main technical performance than the old tamping machine. the machine is suitable for different types of steel and concrete sleeper track, repair cleaning sieve operation after tamping, tamping and applicable to the new track bed ballast. the machine superior performance, reasonable structure, safe and reliable, high efficiency, fully meet the needs of railway ballast tamping operation.