The invention discloses a small river ecology enhancement and construction system. The small river ecology enhancement and construction system comprises concrete water permeable ecological brick protective slopes, a plurality of concrete water permeable ecological brick spur dikes and a plurality of unit ecological system cages. The concrete water permeable ecological brick protective slopes are arranged on the two sides of a small river and extend from the river bottom to the river banks of the small river. The concrete water permeable ecological brick spur dikes are alternately arranged on the two sides of the small river in the extension direction of the small river. The unit ecological system cages are arranged in the small river. By adopting the small river ecology enhancement and construction system, a small river water ecosystem can be constructed in a short period. The constructed ecosystem is healthy, integral and good in effect. The required infrastructure project is small. The small river ecology enhancement and construction system is convenient to maintain and manage and composed of being extensively popularized.