During the application of reverse emulsion drilling fluid in oil field, barite deposition in drilling fluid, excessive filtration and insufficient cuttings suspension capacity often occur, which lead to the accumulation of cuttings at the bottom of the well and the blockage of drilling holes. In this paper, the advantages of barite weighing agent and MicroMax ( micro-manganese) weighing agent are synthesized by the way of compounding. By combining barite with MicroMax, the performance of reverse emulsified drilling fluid under different ratio of barite and MicroMax is studied, and the optimum compound proportion of reverse emulsified drilling fluid is obtained, and a new reversed phase emulsified drilling fluid formula against high temperature and high pressure is put forward. The results show that when the reverse emulsified drilling fluid is only aggravated by barite weighting agent, it shows poor rheological property and settlement stability, and good filtration property under high temperature and high pressure, and the reverse emulsified drilling fluid shows better Rheological property and settlement stability and poor filtration property under high temperature and high pressure when it is only aggravated by MicroMax weighting agent. The results show that the reverse emulsified drilling fluid weighted by barite weight agent shows poor Rheological property and settlement stability and poor filtration property under the condition of high temperature and high pressure. When barite and MicroMax are mixed at 60:40, the reversed phase emulsified drilling fluid with good performance could be obtained when the gel strength, yield limit, static sedimentation coefficient and filtration loss are 13 Pa,23. 6 Pa,0. 506,16. 3 ml, respectively.