Drainage device and water outlet equipment

The invention discloses a drainage device and water outlet equipment, and relates to the field of bathroom equipment. The drainage device comprises a shell, a mounting base, a first piston, a first elastic piece and a plugging assembly. When the water outlet equipment discharges water, the first piston is pushed to slide close to the bottom wall of the first mounting cavity of the mounting seat and compress the first elastic piece under the action of water pressure, and the first piston drives the plugging part of the plugging assembly to move to plug the water outlet. When the water outlet equipment is turned off, the water pressure in the water passing cavity is reduced, and under the action of the elastic force of the first elastic piece, the first piston moves in the direction away from the bottom wall of the first mounting cavity so as to drive the blocking part to move to open the water outlet, redundant water in the water outlet pipe is drained, and it is ensured that hot water can be rapidly discharge