An electronic cigarette, comprising: a shell with a suction end; and a battery box ; an atomizer assembly connected to the battery box ; a guiding component configured for guiding the atomizer assembly, wherein the atomizer assembly slides relative to the battery box via the guiding component to achieve a fixed connection with the battery box , wherein the atomizer assembly comprises a housing and an atomizer arranged in the housing , the guiding component comprises a lead rail and a sliding groove , the lead rail is arranged on a top part of a sidewall of the battery box , the sliding groove is defined in an end of the housing , and the sliding groove matches with the lead rail ; wherein the guiding component comprises two lead rails , and the two lead rails are arranged on the top part of the two opposite sidewalls of the battery box ; wherein the two lead rails extend downwards obliquely along a slide-in direction of the atomizer assembly; wherein the electronic cigarette further comprising a positive electrode and a negative electrode arranged between the two lead rails , wherein the positive electrode and the negative electrode are in elastic contact with the atomizer , a channel is provided in an end of the atomizer adjacent to the sliding groove , the channel extends along a sliding direction of the atomizer assembly, and the positive electrode and the negative electrode are arranged in the channel ; wherein an inclined surface is provided in the channel , and extends upwards along the slide-in direction of the atomizer assembly, so that when the atomizer assembly slides to couple with the battery box , the positive electrode and the negative electrode are pressed down by the inclined surface. a shell with a suction end; and a battery box ; an atomizer assembly connected to the battery box ; a guiding component configured for guiding the atomizer assembly, wherein the atomizer assembly slides relative to the battery box via the guiding component to achieve a fixed connection with the battery box , wherein the atomizer assembly comprises a housing and an atomizer arranged in the housing , the guiding component comprises a lead rail and a sliding groove , the lead rail is arranged on a top part of a sidewall of the battery box , the sliding groove is defined in an end of the housing , and the sliding groove matches with the lead rail ; wherein the guiding component comprises two lead rails , and the two lead rails are arranged on the top part of the two opposite sidewalls of the battery box ; wherein the two lead rails extend downwards obliquely along a slide-in direction of the atomizer assembly; wherein the electronic cigarette further comprising a positive electrode and a negative electrode arranged between the two lead rails , wherein the positive electrode and the negative electrode are in elastic contact with the atomizer , a channel is provided in an end of the atomizer adjacent to the sliding groove , the channel extends along a sliding direction of the atomizer assembly, and the positive electrode and the negative electrode are arranged in the channel ; wherein an inclined surface is provided in the channel , and extends upwards along the slide-in direction of the atomizer assembly, so that when the atomizer assembly slides to couple with the battery box , the positive electrode and the negative electrode are pressed down by the inclined surface. <EOS>