The ceiling lamp base plate comprises a plate body with a lower opening, the plate body is provided with a
rectifier, a wire passing hole and a plurality of steel wire fixing positions, the bottom of the plate body is detachably connected with a bottom cover, and the bottom cover is provided with steel wire row grooves corresponding to the steel wire fixing positions. The ceiling lamp comprises a ceiling lamp base plate, a steel wire and a lamp body, the top end of the steel wire penetrates through the steel wire line groove to be connected with the steel wire fixing position, and the bottom end of the steel wire is connected with the lamp body. According to the ceiling lamp base plate and the ceiling lamp, the bottom cover can be conveniently detached, so that the
rectifier in the plate body can be maintained or replaced, the whole base plate does not need to be taken down, and a user can conveniently maintain the ceiling lamp base plate.