In order to improve the friction reducing performance of magnetic fluids,based on the existing Fe3O4 magnetic liquid,molybdenum dialkyl dithiocarbamate(MoDTC) enhanced magnetic liquid was prepared by adding MoDTC in small quantities.The structure,composition and magnetic properties of the microscopic particles of MoDTC magnetic liquid were tested and analyzed,and the friction and wear experiments of different pressure and speed conditions were carried out on to explore the effect of MoDTC content on the friction and wear properties of magnetic fluids.The results show that the saturation magnetization intensity of the prepared MoDTC enhanced magnetic liquid is smaller than that of ferromagnetic liquid,and the residual magnetism is almost zero,which has good magnetic performance.Within the scope of experimental research,the friction coefficient of Fe3O4 magnetic liquid lubrication is lower than that of oil lubrication,and the friction coefficient of MoDTC enhanced magnetic liquid is lower than that of Fe3O4 magnetic liquid.The friction reduction effect is better when the MoDTC mass fraction is 6%.When the load is in the range from 25 N to 45 N,the friction coefficient of MoDTC enhanced magnetic liquid decreases with the load increasing,and after exceeding the critical value of 30 N,the friction coefficient increases with the load increasing.The above research conclusion shows that the addition of an appropriate amount of MoDTC to the magnetic liquid has excellent friction reduction properties and can improve the lubrication performance of the magnetic liquid to a certain extent.