The magnetization reversal process of nano-size rectangle-shaped NiFe film elements with dif- ferent aspect ratios have been investigated under the orthogonally applied magnetic fields by nucromagnetic simulation. Different magnetization reversal modes can appear depending on whether the bias field is applied or not. When there is no bias field, double “C” state is the ini- tial reversal state. However, when there is a bias field, “S” state is the starting mode. The larg- er the aspect ratio is, the larger the switching field is. But, when the aspect ratio is larger than 3, the increase of the switching field ceases. These results can provide useful information to the application of the patterned NiFe film with rectangular elements. The magnetization reversal process of nano-size rectangle-shaped NiFe film elements with dif- ferent aspect ratios have been investigated under the orthogonally applied magnetic fields by nucromagnetic simulation. Different magnetization reversal modes can appear depending on whether the bias field is applied or not. When there is no bias field, double “C ” state is the ini- tial reversal state. However, when there is a bias field, “S ” state is the starting mode. The larg er the aspect ratio is , the larger the switching field is. But, when the aspect ratio is larger than 3, the increase of the switching field ceases. These results can provide useful information to the application of the patterned NiFe film with rectangular elements.