The invention provides an installation structure of a coral molding wall. First, a rotation mechanism is arranged, the rotation mechanism includes a first mounting base and a rotary table, the rotarytable is rotatably installed on the first mounting base, a coral molding wall body is arranged on the rotary table in a positioning mode, a side positioning mechanism includes a second mounting base,the second mounting base is hinged to a manipulator, the top end of the manipulator is hinged to a support block, and the support block abuts against the side wall of the coral molding wall body, a driving part includes a first motor and a second motor, the first motor is fixedly installed on the first mounting base, the rotary table is driven by the first motor to rotate, the second motor is fixedly installed on the second mounting base, the manipulator is driven by the second motor to lift, and the manipulator drives the support block to abut against the side wall of the coral molding wall body. Compared with the prior art, the installation structure improves installation efficiency and positioning accuracy of the coral modeling wall, and the two mounting bases can be reused, and replacing the modeling wall is convenient.