An evaporation source, comprising an evaporation source body made from a conductive material. The evaporation source body comprises: a main body (101), a material cavity (102) being provided inside the main body (101); a first electrode connection end (103) provided outside the main body (101); and a second electrode connection end (104) with polarity opposite to that of the first electrode connection end (103). After the first electrode connection end (103) and the second electrode connection end (104) are electrified, the main body (101) itself conducts electricity and generates heat, so as to heat the material inside the material cavity (102).