The invention discloses an electronic scale sensor support and an assembling method therefor, and the support comprises a central support, a first rotating piece pivoted to one side of the central support, and a second rotating piece pivoted to the other side of the central support. The central support comprises a central supporting disc and a first supporting leg disposed at one side of the central supporting disc. One end of the first supporting leg is provided with an installation position for a first sensor. The first rotating piece comprises a first rotating disc and a second supporting leg disposed at one side of the first rotating disc. One end of the second supporting leg is provided with an installation position of a second sensor. The second rotating piece comprises a second rotating disc and a third supporting leg disposed at one side of the second rotating disc. One end of the third supporting leg is provided with an installation position of a third sensor. The three sensors are distributed in a triangular manner, and optical sensor symmetric discs which are distributed in a triangular manner form the support for three points. The sensors in the distribution mode are better in stability.