An evaporation device has an evaporation material that can be uniformly heated when it is evaporated with the evaporation device. The evaporation device comprises: a crucible for loading an evaporation material, a body wall of the crucible comprising an inner wall and an outer wall, a chamber being formed between the inner wall and the outer wall, which is filled with an inorganic salt; and a heating element for heating the crucible. During the working process of the evaporation device, when the crucible is heated by the heating element, the inorganic salt inside the chamber would become a molten state under heating, and the inorganic salt in molten state which fills the chamber can conduct heat uniformly such that the temperature distribution of the inner wall of the crucible is more uniform during the heating process and the evaporation material can be heated more uniformly. A method of manufacturing an evaporation device and a usage of the evaporation device are also disclosed in this patent application.