This research.is designed to assess the effects of the leadership style of the secondary school principals on the school improvement. It was basically descriptive research in nature and for the collection of data survey method was used. Twenty senior school leaders from the AJ&k Mirpur department and 60 senior teachers from the public sector were selected as subjects. Samples were selected using simple random sampling techniques. Two questionnaires were prepared, one for the principal and the other for the senior teachers. Mean, standard deviation, and linear regression analysis were used to analyze the data. The result revealed that the leadership style of the school heads greatly contributed to the progress of the school. It is recommended that the principal must understand the level of learning in his department and the ability to share leadership style with the faculty and staff in order to get the most out of the academic process