Four environment friendly lubricant additives，namely N1，N2，N3 and N4，have been designed， synthesized and characterized． The thermal stability，oil solubility and corrosion resistance of these additives have been systematically studied． Tribological behaviors of the lubricant additives in liquid paraffin ( LP) were investigated． The surfaces morphology and elementary composition of the worn scar was recorded and analyzed by scanning electron microscopy ( SEM) and energy dispersive spectroscopy ( EDS) ． The reaction mechanism was initially discussed． It was found that the synthesized additives showed high thermal stability，excellent oil solubility and strong corrosion resistance． Among the four additives，N2 exhibited the best tribological property． For example， the maximum non-seizure load ( PB ) value of LP with 1. 0wt% N2 was 74% higher than that of LP，the sintered load ( PD) value was twice as large as that of LP． The wear scar diameter ( WSD) of 1. 0% N2 + LP system was 54% lower than that of LP，and the friction coefficient was 28% lower than that of LP． The addition of four additives significantly reduced WSD and surface abrasions of LP． The additive participated in tribo-chemical reaction in the friction process，which effectively improved the extreme pressure，anti-wear and anti-friction performance of LP．