In order to understand the machining law of particulate flow drop lubrication, 45 steel finish/rough turning experiments were carried out in the conditions of dry cutting，pouring lubrication and particulate flow drop lubrication. The cutting force, cutting temperature and roughness of samples were measured and compared to study the influence of particulate flow drop lubrication in the cutting process. The results show that the radial cutting force under particulate flow drop lubrication is less than that under pouring lubrication，and the axial and tangential cutting forces are similar to those under pouring lubrication; the cutting temperature under particulate flow drop lubrication is lower than that under pouring lubrication; the finished surface roughness under particulate flow drop lubrication is better than that under pouring lubrication. The particulate flow drop lubrication can replace pouring lubrication, it can significantly reduce the consumption of lubricants，and it is environmentally friendly.