The invention relates to fixed pipeline equipment, and particularly relates to a water dividing and collecting device bracket. The plastic bracket of the water dividing and collecting device comprises an adjusting rack (1), an upper fixing rack (2) and a lower fixing rack (3), wherein the upper fixing rack (2) and the lower fixing rack (3) are adjustably fixed on the adjusting rack (1); a row of necks (10) are formed in the adjusting rack (1); the front end part (12) of each neck (10) forms an inverse calabash shape on the whole; a reducing structure (14) exists on a waist part (13) of the inverse calabash shape; a first hook post (21) is arranged at the bottom of an upper bracket (20) of the upper fixing rack (2); fixed matching is achieved by the first hook post and the necks (10) in the fixing process. According to the plastic bracket of water dividing and collecting device, which is disclosed by the invention, the main body is made of a plastic material, and is lighter and more applicable to an operating environment; the plastic bracket is integrally molded in an injection manner, fewer in component and convenient to process; the adjusting rack and the fixing rack are connected by adopting a buckle structure, and fast to fix; the fixing rack can be adjusted up and down, more flexible to install, practical and reasonable in overall structure, and strong in exploitativeness.