Soviet filmmaker sergei eisenstein promoted which idea about editing?

Montage theory.

Explanation:

Sergei Eisenstein was the filmmaker responsible for promoting Theory of Montage, that the way cinema articulates and approximates images and sounds creating new meanings, a new logic where meanings are not transparent, but are born of the association of fragments.

Eisenstein extrapolated in his artistic and theoretical work the field of cinema, and made significant contributions to reflections in the field of semiotics, psychology, anthropology, and the like.