The invention provides a toilet with adjustable height. The toilet incudes a toilet body, connected on upright posts in a manner of being capable of sliding vertically; the upright posts, wherein at least two upright posts are arranged on the same side of the toilet body in a parallel manner, and a lifting device driving the toilet body to slide vertically is arranged on the upright posts; a drainage pipe, arranged below the toilet body and communicating the inside of the toilet body; and a water tank, connected to the upright posts in a slidable manner, and fixedly arranged above the toilet body. By adding the device capable of driving the toilet to ascend and descend on the toilet, the height of the toilet from the floor can be adjusted to a proper position according to the height of a user when the toilet is used, thus the height of the toilet can be adjusted to be suitable for use by different people, and further improve the practicability of the toilet.