Harvesting machine for water chestnuts in paddy field

The invention discloses a harvesting machine for water chestnuts in a paddy field. A digging shovel support plate of the machine is located at the front end of a rack, a digging shovel is fixed to the digging shovel support plate, the front end of a separating sieve is connected with the digging shovel, the front end of a soil sliding plate is connected with the back end of the separating sieve, the back end of the soil sliding plate corresponds to a feeding port of a cleaning and separating device, a discharging port of the cleaning and separating device is communicated with a feeding port of a fruit collecting box, and a water outlet of a water pumping device is connected with a water inlet of the cleaning and separating device through a water delivering pipeline; a trifilar suspension is located at the front end of the rack, a support wheel mechanism is located in the middle of the rack, a pushing device is located over the separating sieve, and an engine drives the pushing device, the cleaning and separat