The invention relates to a method for treating high-difficulty wastewater by using a solid-state fermentation technology, which comprises the following steps: mixing resin with high-difficulty wastewater to form solid-state gel, adding the obtained solid-state gel, a swelling agent, a strain, a carbon source or a nitrogen source and the like into a fermentation bin, uniformly stirring the mixture,and carrying out solid-state fermentation. In the fermentation process, moisture and organic matter are changed into gas to be discharged, and high-difficulty wastewater is used as a nutrient solution to be continuously supplemented into the fermentation bin to achieve uninterrupted fermentation. The method disclosed by the invention is wide in range of wastewater treatment, strong in treatment capacity and low in cost, and has huge market requirements and wide application prospects.