As an unconventional type of oil and gas reservoir, tight reservoir has the characteristics of low porosity, low permeability and low abundance. Due to the low natural productivity, artificial fracturing technology is often used to transform the reservoir. At this time, it is particularly important to study the productivity of single well after fracturing in tight reservoir. According to previous studies, there are many factors affecting the productivity of a single well after fracturing in tight reservoirs, but the prediction model considering all these main factors has not been established. Therefore, in this paper, the complex fracture network is simplified as an artificial main fracture perpendicular to the horizontal well section and a parallel fracture perpendicular to the main fracture. In the study unit, the fluid flows from the matrix pore in the far well area to the main fracture area in the near well area, and flows into the horizontal wellbore after passing through the seepage area. In order to simplify the calculation process, according to the seepage characteristics of tight reservoir after fracturing, the oil well control area is divided into three seepage areas in this paper. Because the horizontal section of horizontal well is long, the oil-water pipe flow in the horizontal section should also be considered. Based on the theory of percolation mechanics, this paper considers the effects of imbibition, retention pressurization, starting pressure gradient, gravity, stress sensitivity, fracture conductivity, pressure loss in the wellbore of horizontal wells and pressure loss at perforations on oil well productivity, and obtains the prediction model of oil-water two-phase miscarriage energy of fractured horizontal wells in tight reservoirs according to the principle of hydropower similarity. The case analysis shows that the new prediction model can better simulate and predict the productivity of horizontal wells in tight reservoirs after fracturing, and the sensitivity analysis shows that the factors considered in the new model can not be ignored, which has a great impact on the productivity of single wells. The research results provide a theoretical basis for productivity evaluation of fractured horizontal wells in tight oil reservoirs.