With the Machang area of the Dongpu depression as the study area, this pa-per mainly discusses the application of the Repeat Formation Test (RFT) datain multi-well reservoir evaluation. Pressure data may be used to make a qualitativeand quantitative estimation of the permeability of reservoirs. The permeabilityestimate may be used to study the effective thickness standard of oil reservoirs.The transformation of the variation of pressure with depth into the variation ofdensity with depth can help to understand the properties of fluids and determinethe oil-water interface, thus verifying the conclusion of multi-well logging inter- pretation. Study indicates that the application yields marked good results. Theconclusion of the interpretation has been verified by formation and productiontests and the conformity rate of the interpretation increases. The research resultsare conducive to the comprehrensive reservoir evaluation of the study area, andsome of the achievements have been applied in oil production. Finally the paperpoints out that the application of RFT data has a vast prospect.