A liquid injecting structure for an electronic atomizing device, comprising: an outer tube and a liquid injection assembly disposed in the outer tube ; wherein, the outer tube defines an inlet port , the liquid injection assembly comprises a switch assembly , the switch assembly is rotatable between an injecting position (A) and a working position (B) relative to the outer tube ; the switch assembly comprises a liquid injection tube which defines an injecting port ; and when the switch assembly is in the injecting position (A), the injecting port is fluidly communicated with the inlet port , such that liquid can be injected into a liquid storage cavity ; and when the switch assembly is in the working position (B), the injecting port is isolated from the inlet port ; wherein the switch assembly comprises a first sealing member which is circumferentially fixed with the liquid injection tube and rotates synchronously with the liquid injection tube , wherein the first sealing member is connected to the liquid injection tube either directly or by means of a connecting shaft , and the first sealing member defines a first flow port ; and when the switch assembly is in the injecting position (A), the inlet port is fluidly communicated with the injecting port via the first flow port ; and when the switch assembly is in the working position (B), the first flow port is isolated from the inlet port ; characterized in that the outer tube further defines an exhaust port for exhausting air in the liquid storage cavity , and an outlet passage (D) for allowing the exhaust port to be fluidly communicated with an outer atmosphere is defined between the outer tube and the liquid injection assembly ; and when the switch assembly is in the injecting position (A), the exhaust port is fluidly communicated with the outlet passage (D); and when the switch assembly is in the working position (B), the exhaust port is isolated from the outlet passage (D). the outer tube defines an inlet port , the liquid injection assembly comprises a switch assembly , the switch assembly is rotatable between an injecting position (A) and a working position (B) relative to the outer tube ; the switch assembly comprises a liquid injection tube which defines an injecting port ; and when the switch assembly is in the injecting position (A), the injecting port is fluidly communicated with the inlet port , such that liquid can be injected into a liquid storage cavity ; and when the switch assembly is in the working position (B), the injecting port is isolated from the inlet port ; wherein the switch assembly comprises a first sealing member which is circumferentially fixed with the liquid injection tube and rotates synchronously with the liquid injection tube , wherein the first sealing member is connected to the liquid injection tube either directly or by means of a connecting shaft , and the first sealing member defines a first flow port ; and when the switch assembly is in the injecting position (A), the inlet port is fluidly communicated with the injecting port via the first flow port ; and when the switch assembly is in the working position (B), the first flow port is isolated from the inlet port ; characterized in that the outer tube further defines an exhaust port for exhausting air in the liquid storage cavity , and an outlet passage (D) for allowing the exhaust port to be fluidly communicated with an outer atmosphere is defined between the outer tube and the liquid injection assembly ; and when the switch assembly is in the injecting position (A), the exhaust port is fluidly communicated with the outlet passage (D); and when the switch assembly is in the working position (B), the exhaust port is isolated from the outlet passage (D). <EOS>