Provided is a garlic seeder, comprising a frame (1), an engine (5), a transmission assembly, an air pump, an air cylinder (16), a caterpillar track chassis assembly (3), a soil flattener (7), and an operating console (6) and a microcomputer electronic control system (4) both positioned above the caterpillar track chassis assembly (3). A feeding hopper (2) is provided in front of the operating console (6). The feeding hopper (2) is connected to a material providing device (8). A plurality of distributors (9) are mounted evenly above the material providing device (8). A distribution tube (10) is connected under each distributor (9). The bottom of the distribution tube (10) is connected to a guide cup assembly. The guide cup assembly is fixed on a first locating plate (11). Under the guide cup assembly is a cup adjusting assembly. Under the cup adjusting assembly is a point-insertion seeding assembly (12). The point-insertion seeding assembly is mounted on an opening and closing processing support frame. The guide cup assembly, the cup adjusting assembly and the point-insertion seeding assembly respectively control opening and closing by the cylinder and control step amplitude by a running system. The garlic seeder is simple to operate, saves large-scale manual labour, improves operating efficiency, and has good practical effects and economic returns.