Prefabricated module for roadside drainage and prefabricated module unit

The invention discloses a prefabricated module for roadside drainage and a prefabricated module unit. The module comprises a prefabricated module body. A hollow cavity for drainage is formed in the prefabricated module body along the length direction thereof, a water permeable portion connected to the hollow cavity is also formed in the prefabricated module body, and water is introduced into the hollow cavity through the water permeable portion to be collected. The module is characterized in that the cross section of the hollow cavity is of an irregular shape and is formed by a first section, a second section and a third section which are successively connected end to end; the first and second sections are arc-shaped while the third section is straight line-shaped; the water permeable portion is continuously distributed along the length direction of the prefabricated module body, penetrates through the surface of the prefabricated module body and is attached to the hollow cavity. The invention provides the pr