The utility model discloses a portable seeding device for crops, including mounting panel, a plurality of soil breaking seeding heads are installed to the vertical on the mounting panel, and are provided with seed unloading subassembly in soil breaking seeding head, drive subassembly is provided with the outside of soil breaking seeding head, the top of mounting panel is provided with convenient use subassembly, this portable seeding device for crops is provided with first guide rod, toothed plate, gear, second guide body and U plate, in the process of inserting soil breaking seeding head into the soil, U plate contacts the land at this moment, because soil breaking seeding head inserts into the soil in the process, equivalent to push U plate upwards, first guide rod and toothed plate are driven under the guidance of second guide body and move up through U plate, because toothed plate and gear are the meshing relation, and then drive gear to rotate 180 degrees, drive rotating roller to rotate 180 degrees through gear, not only has improved production efficiency, also reduced the frequent operation step.