Abstract: Hydrostatic traveling drive system is widely used in the field of harvesters.For the hydraulic system for traveling wheel harvester, the parameters of components determine the traveling performance or normal operation of the harvester.This paper takes a typical failure analysis process of hydraulic walking applied to the field of harvesters as a case, introduces the details that are easy to ignore in the process of selecting hydraulic parts of harvesters, which has reference significance for other agricultural machinery driven by hydraulic walking.