disclosed are an electronic cigarette and an electronic cigarette device thereof , the electronic cigarette comprising a main rod body , one end of the main rod body being provided with a suction nozzle and the other end being internally provided with a battery , wherein a one - way valve is further provided in the main rod body between the suction nozzle and the battery for providing a gas passage when inhaling gas and shutting off the gas passage when exhaling gas ; the one - way valve comprises a valve seat with two penetrating ends , and a valve core and a valve flap mounted inside the valve seat ; the valve seat or the valve core is provided with a gas guide hole ; and the valve flap is affixed to an orifice at one end of the gas guide hole and generates elastic deformation corresponding to the operation of inhaling or exhaling gas so as to control the open or closed state of the gas guide hole . the electronic cigarette has a function of controlling a one - way gas passage , providing the gas passage when inhaling gas and shutting off the gas passage when exhaling gas .