The influences of W content and friction condition on the tribological properties of W-doped diamond-like carbon (DLC) coatings were studied. Results show that the friction coefficients of W-doped DLC coatings is augmented with the W content increasing; the W-doped DLC coatings with a W content of 3.1% exhibit the best film/substrate adhesion and wear resistance. Under the dry friction condition, the friction coefficients of W-doped DLC coatings with a low W content are increased with the rise of load while low friction coefficients of W-doped DLC coatings with a high W content are found at a high load; the friction coefficients are increased with the rotation rate increasing for the DLC coatings with a high W content, but the influence of the rotation rate on the friction coefficients of un-doped DLC coatings is unobvious. The wear of W-doped DLC coatings are produced by the micro-fracture and peeling in the coatings during the indentation of hard Si3N4 ball into the sample surface