Pure water generating equipment with automatic water cut-off function

The invention discloses pure water generating equipment with an automatic water cut-off function, and particularly relates to the technical field of laboratory instruments, wherein the pure water generating equipment comprises a body, an opening and closing device, a water inlet pipe and a water collecting pipe; wherein the opening and closing device comprises a fixed column, a first elastic piece, a sealing sliding plug, a sliding column, a hollow containing column, a sliding piston and a water power transmission mechanism; the sliding column is fixedly arranged in the hollow interior of the fixed column; one end of the first elastic piece is fixed to the bottom end of the fixed column, the other end of the first elastic piece is fixed to the sealing sliding plug, the first elastic piece is arranged in the sliding column, and the sealing sliding plug is in sliding connection with the sliding column; one end of the containing column communicates with the fixing column, the sliding piston is arranged in the co