Foundation pit blind ditch drainage construction structure and method

The invention discloses a foundation pit blind ditch drainage construction structure. The foundation pit blind ditch drainage construction structure comprises a foundation pit bottom, a blind ditch is formed in the position, close to a slope, of the foundation pit bottom, a layer of dense mesh safety net is laid on and pasted to the inner wall of the blind ditch, the position, on the upper part of the dense mesh safety net, of the interior of the blind ditch is filled with cobblestones, a water collecting well is arranged on the foundation pit bottom, and a steel filter cartridge is inserted in the water collecting well. The invention further discloses a foundation pit blind ditch drainage construction method. The foundation pit blind ditch drainage construction method comprises the following steps that the blind ditch is excavated, the dense mesh safety net is laid and pasted, filling of the cobblestones is conducted, the water collecting well is excavated, and bottom plate concrete is poured. Through the fo