The invention discloses a wire box installation point position construction method. The method comprises steps: 1) a wire tube head reserved on a floor is sleeved with a support frame connector; 2) the space position of the wire box on a prefabricated wall body is determined; 3) a wire box support frame is installed according to the space position of the wire box, the wire box support frame and the support frame connector are connected and positioned, and a panel part of the wire box is fixedly installed on the wire box support frame; 4) a wire tube with a matched length is cut out, the lowerend of the wire tube is connected with the wire tube head, and a wire joint in the wire tube is connected with the wire box; and 5) the wall body is fabricated according to the position of the prefabricated wall body, and the wire box is embedded in the wall body. The wire box point position is well adjusted when the support is fixed in advance, for example, elevation, an out-wall size and whetherto be stable are adjusted. Collection of construction slag for multiple times is not needed, and later chiseling is not needed, and the wire box support frame can be fixed without drilling in the bottom plate.