Recoverable polysaccharide surfactant fracturing fluid for gas well and preparation method of fracturing fluid

The invention provides a recoverable polysaccharide surfactant fracturing fluid for a gas well and a preparation method of the fracturing fluid. The fracturing fluid comprises 94.82-95.94 parts of a polysaccharide surfactant fracturing fluid flow-back fluid, 4.0-5.0 parts of a polysaccharide surfactant, 0.01-0.03 parts of a micelle conditioning agents and 0.05-0.15 parts of a gel breaker. The recoverable fracturing fluid for the gas well is formed due to viscosity increase of polysaccharide in the polysaccharide surfactant and the creep property of the polysaccharide surfactant, has good dissolution dispersity, has low requirements for water quality and is simple to prepare with the process. The flow-back fluid is subjected to simple sand setting and filtering, then a small quantity of the polysaccharide surfactants are added, and secondary utilization of the fracturing fluid is realized. A small quantity of micelle conditioning agents can be added to the fracturing flow-back fluid with poor water quality, so that the crosslinking performance of the fracturing fluid can be improved. The recovery process of the fracturing fluid is simple, waste of water resources and damage to the environment are reduced, and a good environmental protection effect is realized.