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Abstract The development of sweet spot in tight gas reservoir is restricted by various factors, which cannot guarantee reasonable, efficient, and low-cost development, and technical policy of development is also immature. Through fine geological modeling and numerical simulation technology, and in accordance with the microseismic monitoring results, the pressure recovery test data, and analysis of the relationship between irreducible water saturation and permeability, history matching is conducted. On this basis, new wells can be designed and simulated again in this sweet spot. Finally, it is concluded that the horizontal well with staggered well pattern is the reasonable development of sweet spot, the reasonable well space is 600–800 m, the reasonable length of the horizontal section is 1200 m, and the reasonable initial gas production rate is 8 × 104 m3/day.