Mechanical improvements of rescue robot vehicle for water disaster have been achieved. A suspension and steering mechanism are applied to the vehicle with variably configured segmented wheels (VCSW) in order to improve the stability and maneuverability. Double wishbone link mechanisms are adopted for suspension and wire drive systems are adapted to the vane control. A rack-pinion mechanism is applied to the steering, which is driven by a RC servo. The running speed is 7-10% improved. The vehicle can adapt to up to 55 mm road surface undulation. The length of this vehicle is 560mm, width is 526mm, and height is 254mm.