The utility model discloses a compulsory locator for interior decoration spray. The compulsory locator comprises a keel blocking piece (1) and a multifunctional locating plate (2), wherein the keel blocking piece (1) is provided with two buckles (3) at the two ends and a folding slot (4) in the middle; the two sides of the multifunctional locating plate (2) are inserted and connected into the folding slot (4) of the keel blocking piece (1) in a left and right adjustment way; the keel blocking piece (1) is clamped and connected with a keel by the buckles (3) in a front and back adjustment way; a circular hole is formed in the middle of the multifunctional locating plate (2). The compulsory locator for interior decoration spray effectively solves the problems that in the past project process, decoration installation pipelines 'fight with one another' and are repeatedly located, the schedule of an installation unit is not in harmony with that of decoration construction, so the overall progress is influenced, and the time limit for a project is delayed, and the like; after the compulsory locator is adopted, the schedule of the installation unit is effectively promoted, so that the schedule of decoration construction can be better promoted.