The invention discloses a mechanical crop collection device. The mechanical crop collection device comprises a hollow shell, a controller fixed at the top of the hollow shell, and a storage battery fixed at the top of the hollow shell, wherein a group of hollow structures is arranged at the centre in the hollow shell; the hollow shell is provided with a group of fan blade placement groove structures at the bottom of each hollow structure; a group of motors is fixed at the centre of the top of each hollow structure; a main shaft of each motor penetrates through the hollow shell, and one end of the main shaft extends to the interior of the hollow structure; and the main shaft of each motor is fixed with a group of turbines at one end in the corresponding hollow structure. The mechanical crop collection device disclosed by the invention is capable of automatically collecting crops stacked together, rapid in collection, simple to operate, and capable of effectively reducing a time needed for the collection and lowering the labour intensity of peasants; and in addition, the device is multi-purpose, and transmission action and dust collection action can be realized through the group of motors, thus the equipment cost is lowered.