The invention relates to an old well re-transformation volume fracturing technology, which is characterized by mainly comprising the steps of carrying out primary fracturing analysis, pre-fracturing evaluation and well selection decision making on to-be-refractured wells with excavation potential, and determining a to-be-refractured well with excavation potential; screening fracturing fibers and particle temporary plugging agents; screening out the fracturing fibers and the temporary plugging agents storing re-transformation according to the temperature, the pressure, the water production rate, the mineralization degree and the fracturing fluid type of a reservoir stratum; carrying out dynamic and static performance evaluation on the screened fracturing fibers and the particle temporary plugging agents, and determining the fracturing fibers and the particle temporary plugging agents which are finally required; determining construction parameters; carrying out fracturing construction; completing transformation for reservoir stratum construction; and acquiring great reservoir stratum transformation volume, and enabling a near wellbore area major fracture to keep high flow conductivity. According to the invention, great reservoir stratum transformation volume can be acquired, and the near wellbore area major fracture is enabled to keep the high flow conductivity.