Electronic atomization device, atomizer and atomization core thereof

An electronic atomizing device (100), an atomizer (1) and an atomizing core (12) thereof, the atomizing core (12) comprising a liquid guide member (121) having an atomizing surface (128) and a liquid suction surface (127) for conducting a substrate to be atomized from the liquid suction surface (127) to the atomizing surface (128); the heating element (122) is arranged on the atomizing surface (128) and is used for heating and atomizing the substrate to be atomized to generate aerosol; the liquid guide piece (121) is further provided with a gas guide structure (123); the air guide structure (123) comprises a groove (125) and/or a blind hole (126) arranged on the atomization surface (128), and is arranged around the heating element (122). A gas guide structure (123) is arranged at the part, close to a heating element (122), of a liquid guide element (121), aerosol heated and atomized by the heating element (122) is directionally conducted through the gas guide structure (123), contact between the aerosol and t