Abstract: Due to some hoister installation problems in old mine  transformation, based on research of the deflection angle of hoisting rope which is one of five main factors on the mine hoisting system, and in combination with the specific conditions of hoister installation in Gujiatai Iron Ore of Laiwu Mining Co., Ltd.of Laiwu Steel Group, some measures are determined to solve the overlarge deflection angle of hoisting rope in hoister installation, which can fully meet the requirements of hoister installation.  

Key words: Deflection angle of hoisting rope, Mine hoister installation, Mine hoisting system