Water collecting tank structure of greenhouse

The utility model discloses a greenhouse water collecting tank structure, which comprises a water collecting tank structure arranged on a greenhouse cross beam, the water collecting tank structure comprises a first water collecting tank, a second water collecting tank, a transition supporting plate and a hanging plate, the first water collecting tank comprises a plurality of sections of rain gutters connected end to end, the transition supporting plate is arranged at the splicing position of the adjacent rain gutters, and the transition supporting plate is positioned below the rain gutters; the second water collecting tank is hung below the transition supporting plate through a hanging plate; supporting columns are further arranged on the greenhouse cross beam, the supporting columns penetrate through the second water collecting tank, and the greenhouse cross beam supports the transition supporting plate through the supporting columns; a transition supporting plate is arranged on the outer surface of the ridg