Hangjinqi block in Ordos Basin is a tight sandstone gas reservoir with low porosity and permeability. To develop this type of reservoir with multi-stage fractured horizontal well is the most effective way. The fracture distribution of multicluster staged fracturing for the horizontal well has a significant influence on gas production. In order to get the highest gas productivity，an unsteady productivity prediction model was proposed in the consideration of fracture interference，threshold pressure gradient，and the coupling of flow in both fractures and matrix based on the potential theory and potential superposition principle. The gas productivity of both straight fractures and curved fractures can be estimated with the model.In this study，He3 Formation of Jin58 well area in Hangjinqi block was studied. Influence of fracture parameters on the gas productivity in each stage was discussed with orthoganality design method in conditions of different clusters. The results show that the influence of the fracture parameters on the gas productivity for either three or four cluster fractures in each stage from strong to weak are as follows：the half length of total fracture，length ratio，fracture conductivity，and the space ratio. The“U”pattern and nonuniform fracture pattern are recommended for this block.