The present invention relates to an automatic till harvester for tidal flats, and more particularly, to an automatic till harvester for tidal flats, comprising: a main body having an open top, A plurality of conveyance wheels formed on an inner circumferential surface of the main body to expose a plurality of friction panels in order to increase the frictional force between the tidal flats and the main body to facilitate easy conveyance of the main body, A foldable wheel for guiding the stable feeding of the main body to be folded and stored in the main body a collecting means disposed in front of the main body for picking up the crotch in the tidal flats and forcibly feeding the picked crotch to the ground Guiding means coupled to the sampling means for guiding the cock collected through the sampling means into the main body A lifting cylinder connected to the guide means and connected to the guide means for lifting or lowering the sampling means together with the guide means so as to guide the picking operation through the sampling means and the stable feeding of the main body And a control box for controlling the operation of the wheels, the picking means, the guide means and the elevating cylinder.It is possible to easily collect a large number of fishes in a short time from the tidal flats by collecting only the fish in the tidal flats through the sampling screen of the sampling means and collecting the collected fishes by the guide means in a simple manner. Not only the efficiency of the operation is excellent in addition to the efficiency of the operation, but also the moving wheel and the folding wheel installed on the main body can float to the tidal flats due to buoyancy of the body itself as well as the ground or tidal flats, And the transportation is very easy, so that the versatility of the apparatus can be enhanced.Further, when the apparatus is moved, the collecting means is raised and lowered together with the guiding means through the lifting cylind