The invention discloses an automatic residual feed and
manure extracting device of an
aquaculture pond. The automatic residual feed and
manure extracting device comprises a
sludge discharge part, a back washing and flushing part, a
mud pump bin and a
sludge absorbing part at the bottom layer, wherein the
sludge discharge part is positioned at the top end of the device, and is used for connecting a water draining hole of the
mud pump with an outer sludge
discharge tube; the back washing and flushing part comprises cleaning tubes which are positioned at the two sides of the sludge discharge part, and cleaning ring tubes at inner and outer
layers for flushing and stirring sludge on the bottom of the pond; the
mud pump bin is positioned below the sludge discharge part, and is used for mounting and fixing the mud pump; the bottom-layer sludge absorbing part is positioned on the bottom of the device, comprises a plurality of sludge absorbing tubes which are arranged in a radial manner; and a single side of each sludge absorbing tube is provided with a plurality of sludge absorbing holes. According to the automatic residual feed and
manure extracting device, open-and-shut control on a
sewage discharge path and open-and-shut control on a cleaning water path are carried out through a controller; when the water of the outer sludge discharge tube is clear and a sludge discharge solenoid is closed, a flushing
solenoid valve is opened, and is automatically closed after flushing is carried out for a certain time; inclined flushing holes of the clearing ring tubes at inner and outer
layers can effectively stir the sludge on the bottom layer, so that the bottom layer waste collecting efficiency is improved.