The invention relates to the technical field of PC decoration, and discloses an indoor PC decoration integrated component for a fabricated building. The component comprises first supporting columns, asupporting sheet is fixedly connected to the bottom of one side of the first supporting column, a limiting rod is fixedly connected to the surface of the supporting sheet, a clamping plate is fixedlyconnected to the top of the first supporting column, first limiting grooves are formed in the tops of the other sides of the first supporting columns, a first fixing rod is inserted into the first limiting grooves, a main limiting strip is fixedly connected to the bottom of the first fixing rod, and a second supporting column is inserted into one end of the main limiting strip. According to the indoor PC decoration integrated component for the fabricated building, through the arrangement of the main limiting strips, an auxiliary limiting strip, a fixing groove and the first limiting grooves,during use, the clamping design is adopted, so that the situation that the working speed is reduced due to frequent use of bolts is avoided; and during installation, a splicing mode is adopted, so that the structure is stable, the convenience and rapidness are achieved, the working efficiency is greatly improved, and the working speed is accelerated.