To provide a design support system for vehicle suspension which, regardless of difference of types and mechanisms of suspensions, can easily recognize individual inherent definition point, and specification data for individual definition point can be easily inputted.

This design support method for vehicle suspension which produces a simulation model of the suspension using a CAD system, includes, as its feature, a procedure to designate the suspension of design object, a procedure to open a specification data input window specific to the designated suspension, a procedure to input specification data for each definition point specific to the designated suspension in the specification data input window, and a procedure to produce a simulation model based on the specification data for each definition point.