The invention discloses an all-dimensional wheeled mobile robot chassis. The chassis comprises wheels, a suspension unit, a transmission unit, a driving unit, a chassis frame and a power unit. Mecanumwheels are adopted as the wheels of a robot, compared with other wheels, the Mecanum wheels can achieve pivot steering, translation and pozidriv walking, and the turning radius of the robot is greatly reduced, so that the robot is more flexible and passes through the narrow and small space conveniently; each wheel is provided with an independent driving motor, and a 57 stepping motor and a speedreducer are adopted, so that the robot is high in displacement precision and has point fixing and positioning effects; the mobile robot bears a heavy load, can bear a weight of 100 kg and is high in slope climbing capacity and driving force; each wheel is provided with an independent damping unit, the wheels cannot influence one another on the uneven ground, so that the robot keeps stable, the damping effect is improved, and accordingly the capacity of getting rid of the difficulty is improved.