The invention discloses a universal rack having adjustable height and stability and used for decoration. The universal rack includes a movable rotating shaft, a first rack body, a second rack body andsquare cushion blocks, the first rack body and the second rack body are movably connected by the movable rotating shaft, a plurality of pedals are arranged at the inner side of each of the first rackbody and the second rack body, every pedal includes a foot pedal and adjusting plates arranged at two sides of the foot pedal, and an adjustment mechanism is arranged at the bottom of each of the first rack body and the second rack body. A worm wheel and worm principle is used to make adjusting rods move up and down in order to drive the adjusting plates to rotate, so the adjustment of the foot pedals is achieved; compared with convectional universal racks, the universal rack in the invention is flexible, especially enhances the flexibility and the controllability of the foot pedals, and makes the foot pedals always keep horizontal when used by an operator in order to achieve high safety and reliability.