Abstract: A foldable trolley frame includes an elongated main body, a slide member sleeved movably on the main body, two transverse axle units provided on two sides of the main body and respectively and pivotally connected to the main body, a pair of connecting rods interconnecting the axle unit and the slide member to position the axle units on two sides of the main body, and a pair of support rods which have front end portions pivoted to the main body and rotatable about a horizontal axis which is located near the front end portion of the main body. A U-shaped support has two inclined arms pivoted to the rear end portion of the support rods at the upper ends and rotatable about an upper horizontal axis, and a horizontal section which interconnects the inclined arms and which is connected pivotally to the slide member in such a manner that the arms extend forwardly and upwardly from the horizontal section.