The design features of a high-speed trailed forklift track were discussed,and the CAE model,namely Virtual Prototype,of the simulation about matching analysis between suspension system and entire car was set up based on ADAMS.

Relying on the test results about vehicle\'s ride comfort,the moments of inertia of the body were identified by means of the optimization technology and used to amend the Function Virtual Prototype of dynamic simulation about matching analysis between the chassis and body of a high speed forklift in order to insure the reliability of the simulation.

This article discusses, by an overall comparision between 4 different schemes of train speed, the highest train speed in Guangzhou Metro Line 3 from aspects of technical feasibility, construction investment and operation expenses,and comes to the conclusion that the choice of 120km/h is the most economic and reasonable one.