Horizontal branch multi-well-group butted well and construction method thereof

The invention discloses a horizontal branch multi-well-group butted well and a construction method thereof. The butted well adopts a distribution structure that a horizontal well corresponds to at least two vertical well groups; each vertical well group comprises at least two vertical wells; the vertical wells of each vertical well group are respectively communicated with the horizontal well at the target points respectively arranged at the bottoms of the vertical wells, so that horizontal mining channels which correspond to the vertical well groups one to one can be formed; and the target points arranged at the bottoms of the vertical wells are arranged in a target ore bed. By adopting a novel well drilling distribution form, the horizontal branch multi-well-group butted well enlarges the bare area of the ore bed, improves the mining efficiency, lowers the well drilling cost, reduces the construction period and reduces the mining risk.