The invention relates to a sliding track without rolling balls, which comprises a first track body, a second track body assembled in the first track body and a third track body assembled in the second track body, wherein the second track body is positioned between the first track body and the third track body, the first track body and the second track body, as well as the second track body and the third track body, are respectively in curved surface-shaped direct contact, the second track body comprises an upper arm and a lower arm, which are symmetrically arranged, each one of the upper arm and the lower arm comprises a first kinked part, a second kinked part, a third kinked part and a fourth kinked part, which are sequentially connected, arc-shaped first sliding parts are respectively formed on the edges of the junctions between the second kinked parts and the first kinked parts and in sliding contact with the third track body, and arc-shaped second sliding parts are respectively formed on the edges of the junctions between the fourth kinked parts and the third kinked parts and are in sliding contact with the first track body. All the track bodies of the sliding track without the rolling balls of the application are in curved surface-shaped direct contact, thereby not only reducing the use of the rolling balls and other elements and saving the cost, but also being firm in structure, being strong in bearing capacity and being labor-saving to slide.