A motor structure includes a first silicon steel seat, at least one insulation support and a second silicon steel seat. The first silicon steel seat has a receiving space. The insulation support is disposed in the receiving space. The insulating support has a winding section. A first protection wall section and a second protection wall section are respectively formed on two sides of the winding section. The second protection wall section is formed with multiple through holes. Two ends of the second protection wall section are respectively formed with a first channel and a second channel. The second silicon steel seat is assembled and connected with the second protection wall section. The manufacturing cost of the motor structure is lowered and the manufacturing process of the motor structure is simplified.