Three-dimensional overall prefabricated body for reinforcing T-shaped section beam

The invention discloses a three-dimensional overall prefabricated body for reinforcing a T-shaped section beam. The cross section of the three-dimensional overall prefabricated body (3) is T-shaped; the prefabricated body (3) is formed by identical unit cells and is formed by weaving along the outer side of a T-shaped core mold; each unit cell structure is provided with main body axial yarns (1) and boundary weaving yarns (2); the main body axial yarns (1) are vertical and fixed inside the unit cell, and the boundary weaving yarns (2) on four surfaces penetrate through and interleave slantly along directions +/-45 degrees and +/-135 degrees, so as to form a spatial three-dimensional structure. The content of the main body axial yarns (1) in the prefabricated body can be more than 80%; the property in the thickness direction is enhanced on the basis that the axial property is remarkably enhanced; the T-shaped section beam can be woven in an integral copying mode at one time; negative influence on the T-shaped section beam caused by the fact that reinforcing points are not accurately selected and grooves and holes are formed complexly is overcome; the reinforcing process is simplified; the operation difficulty and the working difficulty are reduced.