The volcanic gas reservoir in Jilin oilfield has the characteristics of low permeability, poor connectivity and low natural fracture production. The reservoir has high content of clay minerals and high displacement pressure. And the water sensibility and water blocking damage in the reservoir is severe. Therefore, it’s necessary to select the optimal low-damage fracturing and take drainage gas recovery technology. In this paper, the fracture network propagation ability and core damage evaluation of the reservoir were carried out. Based on “increasing the stimulated reservoir volume and reducing the reservoir damage”, the integration technology of large-scale fracturing and drainage gas recovery of horizontal Wells is formed. In terms of increasing the stimulated reservoir volume, the “three-stage” fracture-forming and then netting fracturing technology was used. Applying “high pump rate and large amount of sand and optimal fluid volume” ensure fracture propagation and improve the conductivity of the reservoir. The following measures are used to reduce reservoir damage: (1) Self-developed nano-surfactant whose solution particle size is less than 150 nm and surface tension is less than 21 mN/m was used to play the role of displacing gas and reduce water blocking damage. (2) Four advanced drainage gas recovery technologies are equipped to shorten the retention time of fracturing fluid in the reservoir, avoid secondary damage of well-bore cleaning operation, reduce fluid accumulation in the well-bore, improve the liquid carrying capacity of gas wells and ensure the productivity of gas reservoir. The integration technology in this paper has been successfully applied in 4 wells. All proppant is quartz sand. The pump rate was 8–16 m3/min, the sand mass per meter was 3.4 t/m, the fracturing fluid volume per meter was 24 m3/m, gas production per kilometer increased from 2.7 × 104 to 4.9 × 104 m3/km. The effect of production increasing and cost reduction is remarkable.