The particles of the plugging agent are fine and uniform, with good rheological and injection properties. The pumpable time can be adjusted according to the specific well conditions. After solidification, it forms a three-dimensional network structure, which has the characteristics of high strength, high plugging rate, high dissolution rate, less water separation, and no shrinkage. Compared with conventional plugging agents, this technology has a wide range of applications, strong technical adaptability, long effective period, high success rate of measures, and especially has the advantages of high temperature resistance, high pressure, high mineralization, and high strength for unblocking. The construction is safe and simple.