The present work aims to synthesize a silver matrix self-lubricating nanocomposite with improved sliding electrical contact properties by using molecular level mixing process and spark plasma sintering. The sliding electrical contact properties of the nanocomposite are fully evaluated, and the microstructural evolution of the lubricating film are analyzed by X-ray photoelectron spectroscopy and scanning electron microscopy. The microstructural evolution of the lubricating film is investigated to determine the influence of sliding speed on the sliding electrical contact properties of the silver matrix self-lubricating nanocomposite, and the self-lubricating mechanism of the silver matrix self-lubricating nanocomposite under vacuum condition is discussed. It is confirmed that Ag-WS2-MoS2 nanocomposite has excellent sliding electrical contact properties under vacuum condition with a high wear-resistance of 1.37 x 10(-6) m(3)/N.m, a low friction coefficient of 0.126, and a contact resistance as low as of 2.16 m Omega Decreasing the sliding speed increases the lubricating film thickness. (C) 2020 Elsevier B.V. All rights reserved.