Lubrication is the key to ensure the performance and life of space moving parts,and lubricating oil supply is one of the most important components of the lubrication system.Limited by the constraints of space product structure,volume,weight and non-repairability,it is necessary to adopt the minimal quantity lubrication technology with simple structure and reliable performance.According to the service conditions and technical requirements of space micro-lubrication,the prototype of space micro-lubrication device and its supporting performance measurement and control system were respectively developed,and the validity of the principle and function was verified through oil supply experiments.Under the condition of gravity,the proof-of-principle prototype was measured for the oil supply under different pulse duration,different driving pressures and different oil pipeline diameters.The designed micro oil supply device uses bellows oil storage,spring pressure storage,and micro electromagnetic valve throttling to carry out active micro oil supply.The experiment shows that the micro oil supply device can achieve micro and multiple supply of space lubricating oil.