The invention discloses a radial equal compression process of porcelain blocks used for production of a long dental bridge. The radial equal compression process comprises the following steps: S1, placing the porcelain blocks between an upper hydraulic machine and a lower hydraulic machine, ensuring that the porcelain blocks are positioned between the upper hydraulic machine and the lower hydraulic machine, ensuring that the upper hydraulic machine and the lower hydraulic machine are vertically arranged, mounting a left hydraulic machine and a right hydraulic machine on the left sides and the right sides of the porcelain blocks separately and further ensuring that the left hydraulic machine and the right hydraulic machine are horizontally arranged; S2, carrying out compression on the porcelain blocks in the longitudinal direction, so as to realize radial compression of the porcelain blocks; and S3, after the completion of the S2, controlling the piston rods of the upper hydraulic machine and the lower hydraulic machine to retract, further controlling the piston rods of the left hydraulic machine and the right hydraulic machine to retract, taking out the porcelain blocks after compression, so as to realize radial equal compression of the porcelain blocks. The radial equal compression process for porcelain blocks used for production of the long dental bridge has the benefits as follows: the problem that the produced long dental bridge is liable to deformation is avoided, the service life is longer, and the manufacturing process is simple.