Atomizing core assembly, atomizer and electronic cigarette

The invention discloses an atomizing core assembly, an atomizer and an electronic cigarette. The atomizing core assembly comprises a fixing base used for being installed on the oil storage assembly, a mounting base, a heating wire, first oil storage cotton and second oil storage cotton, wherein the mounting base is connected with the fixing base, a containing cavity is formed in the mounting base, a first oil inlet groove is formed in the side wall of the mounting base and extends in the axial direction of the mounting base, and the first oil inlet groove and the oil inlet hole are both communicated with the containing cavity; the heating wire comprises a heating main body and a pin, the heating main body is accommodated in the containing cavity, and the pin penetrates through the fixing base; the first oil storage cotton covers the heating main body, and at least a part of the first oil storage cotton is accommodated in the containing cavity; and the second oil storage cotton is coated outside the mounting b