An anti-theft suspension device for socket including a main body, a socket holder, and a locking mechanism is provided. The socket holder includes a seat and a receiving member. The seat is disposed on the main body. The receiving member is rotatably disposed on the seat. The receiving member is rotatable between a locking position and a unlock position. The socket holder includes a positioning bump located on one of the seat and the receiving member. When the receiving member is rotated, the positioning bump is alternatively exposed outside the socket holder to buckle the socket or received in the socket holder to release the socket.