Here's what happened to the statue in the film:
* It is acquired by Chris MacNeil: The statue, which is a representation of the demon Pazuzu, is a gift from an archaeologist friend to the actress Chris MacNeil. It is displayed in her daughter Regan's bedroom.
* It becomes a focal point for the demonic possession: The statue is used by the demon Pazuzu to manifest his power and torment Regan.
* It plays a crucial role in the exorcism: During the climactic exorcism scene, Father Damien Karras attempts to destroy the statue by smashing it with a crucifix, but it appears to be indestructible.
The statue remains intact at the end of the film. While there are some minor inconsistencies in the way the statue is depicted in different versions of the film, it ultimately survives the events of the movie.