The present invention provides a crucible of a coating machine The crucible includes a heat conduction device installed inside the crucible. The heat conduction device includes one or multiple radial metal wires or metal strips disposed along a radial direction of the crucible, and one or multiple axial metal wires or metal strips disposed along an axial direction of the crucible. By the heat conduction device formed by metal wires or metal strips, it can achieve a better heat conduction such that the heating temperature of the organic material placed in the crucible is uniform to achieve the steady state of thermal equilibrium. And the crucible can fill more material, increase evaporation rate, decrease the number of refilling the material, and improve production efficiency.