After the fracturing in tight reservoirs，a complex fracture network system was usually formed near the well. The scientific and reasonable quantitative description of the characteristic parameters of the fracture network between injectionproduction wells was important to the customization of the sealing measures for gas channeling and the adjustment of development plans. Based on the previous research results，the characteristic functions of major characteristic parameters of the fracture network，such as porosity，permeability，opening，and line density of fractures，were improved with the principle of conservation of matter. Besides，the specific methods and steps for quantitative calculation of the characteristic parameters of inter-well fracture network after gas channeling in tight reservoirs were proposed. A case in point was the well group XN of Shengli Oilfield（Dongying City，Shandong Province）. The quantitative calculation results of characteristic parameters of inter-well fracture network were obtained，namely fracture porosity of 0.250%-0.251%，average fracture permeability of 42-1 563 mD，fracture opening of 14-87 μm，and fracture line density of 29-176/m. According to the analysis，the fracture porosity of well group XN is far less than the average porosity of reservoir on the whole and the fracture is strongly developed. The average fracture permeability and average gas-channeling velocity vary drastically with each individual gaschanneling well. Micro-fractures are the majority，but there are some large fractures for gas channeling. The individual well with fast gas channeling is featured by high average permeability，large fracture opening，and low line density of fractures.