The invention discloses a method for improving the bipropellant attitude control thruster pulse control precision. By establishing the relation between the bipropellant attitude control thruster pulse control precision and the propellant control valve switch response time as well as the relation between the injector liquid collection cavity volume and the filling time, the method for effectively improving the bipropellant attitude control thruster pulse control precision is put forward. Quantitative design and analysis of the pulse control precision of a bipropellant attitude control thruster can be achieved, the design difficulty of the bipropellant attitude control thruster high in pulse control precision can be lowered, and the product development quality is improved.