The invention relates to a linear motor for a sliding door. The linear motor comprises a mover component, a stator component and controllers controlling the mover component to move. The stator component is electrically connected with the controller; the stator component comprises two or more than two stators; the controllers are arranged between every two adjacent stators; end portions of the stators on the two sides of the controllers are provided with Hall devices. The controllers are arranged between every two adjacent stators, so that the mover component can move on both the left sides andthe right sides of the controllers and the moving travel of the mover component is increased; the end portions of the stators on the two sides of the controllers are provided with the Hall devices, so that the travel of moving to the left sides and the right sides of the mover component is further increased; thus, even the length of the stator component stays the same, the linear motor system canadapt to wider door openings and the adaptability of the system is greatly improved.