Water-conservancy type citrus culture greenhouse

The invention relates to a water-conservancy type citrus culture greenhouse. The water-conservancy type citrus culture greenhouse is characterized in that the middle part of an arc-shaped ceiling is provided with a concave part; a drainage groove is arranged on the concave part along a length direction, and is communicated with a pipeline and a water storage groove via through holes; a precipitating and filtering groove and a drainage groove are arranged at both ends, near the pipeline, of the drainage groove, and are communicated via an overflow hole; a sludge collecting groove is arranged below one side of the precipitating and filtering groove, the upper end of the sludge collecting groove is sealed, a piston rod is arranged in the sludge collecting groove, the lower end of the piston rod is used for opening or closing a bottom opening of the sludge collecting groove through a piston head, the upper end of the piston rod extends out of the sludge collecting groove, and the extendingpart is connected with t