Abstract: This invention relates to the field of cart technology, particularly to a height-adjustable multifunctional collapsible cart. This invention includes a cart body, wherein the cart body comprises a lifting mechanism, left and right side wall components, front and rear cross components, bottom frame components, pull rod components, wheel components, and fabric pocket components. By designing the structure of the lifting mechanism, left and right side wall components, and front and rear cross components, the device is easy to adjust in height, increases the loading capacity, and can be adjusted to the height of a person's standing operation after installing a tabletop, making the device easier to open and fold. Furthermore, through the structure design of the wheel components and fabric pocket components, the wheels, pockets, and tabletop can be quickly assembled and disassembled, giving the cart a good commercial value.