The present invention discloses a punching-free mounting assembly for installing a curtain, has a mounting seat; the mounting seat is provided with a top block slidingly connected with the mounting seat, and a self-locking unit used for pushing the top block; a part of the self-locking unit is exposed outside the mounting seat; the mounting seat is provided with a top block and a self-locking unit inside. In addition, a part of the self-locking unit is exposed outside the mounting seat, which is convenient for a user to adjust the self-locking unit, and since the self-locking unit is far away from the top block, interferences such as being too close to the wall body are avoided, making the installation more convenient and efficient.