The invention discloses a method for oil deposit flow state digifax calculating with discrete fracture line processing. First, an oil deposit storage layer is divided into continuous media and discrete fracture media; in order to remove minimum meshes, discrete fracture thicknesses are ignored when oil deposit meshes are established, the section of a discrete fracture on a plane is changed to a line segment, then rock stratum meshes are established, three-dimensional oil deposit meshes are then established; oil deposit parameters such as practical measuring holes, leakage, saturation are recorded into a simulator, wherein real values are used for discrete fracture widths, mesh display values are not used, accuracy of calculating results is not lowered by deformation; the oil deposit parameters are corrected through a history fitting method; then oil well yield, surplus oil-gas distribution and storage amount are calculated. The problems that a discrete fracture numerical simulation technique can be easily interrupted and fail, calculating time is long can be solved, the whole process of practical oil deposit development can be really calculated through the technology, so that accuracy of oil deposit flow state calculating is improved, and accordingly an effective development scheme is formulated to improve oil deposit development effect.