This paper designed a new type of the gearbox of tracked vehicles according to the principle of hydro-mechanical hybrid steering on the positive independent dual-streams transmission for tracked vehicles.

To overcome the objective conflicts of multi-attribute decision-making and reduce the complicacy of repetitive decision-making,a directed hierarchy model of multiple criteria analysis based on the independence axiom and an evaluation method based on the improved information axiom were presented through investigating the decision-making process based on the axiomatic design theory.