Rainwater diversion device used for metal roof and metal roof

The invention relates to a drainage connecting technology for metal roofs and provides a rainwater diversion device used for a metal roof and the metal roof. The rainwater diversion device is providedwith a front end drainage part. The front end drainage part comprises a diversion bottom plate, a drainage plate, multiple hollow pillars and multiple first connecting structures. The diversion bottom plate is arranged on the upper side of a roof plate of the metal roof. The drainage plate upwards extends out from the diversion bottom plate, and therefore water flowing from the front side of thediversion bottom plate flows to one side or two sides of the diversion bottom plate. The multiple hollow pillars upwards extend out from the diversion bottom plate and are located on the front side ofthe drainage plate. Each of the multiple first connecting structures is installed on the correspondingly arranged hollow pillar, and therefore the diversion bottom plate can be installed on the roofplate. Due to the fact that