Vapour deposition wire source

A vapour deposition wire source, comprising a housing (100) and a crucible (200) arranged in the housing (100), wherein the crucible (200) comprises a pot body (201) and a nozzle (202), the pot body (201) is externally provided with a heating device (300) for heating the pot body (201), and a heat insulation device (400) for preventing heat from dissipating towards the housing (100) is arranged between the housing (100) and the heating device (300).