The invention relates to a large-seed directional seeding device, comprising an operating platform, a conveying mechanism, a seedling disc, a hole pressing mechanism, a camera shooting detection mechanism, a seeding mechanism, a seed box, a guide plate, a direction adjusting mechanism, a correcting mechanism and a control box, wherein the operating platform comprises a rack and an operating platform surface; the conveying mechanism, the hole pressing mechanism, the camera shooting detection mechanism, a seed absorbing mechanism, the direction adjusting mechanism and the correcting mechanism are connected with a control system in the control box; and the camera shooting detection mechanism is a computer which is externally connected with the control system in the control box and is internally equipped with image processing software. According to the large-seed directional seeding device provided by the invention, a sensor accurately detects and feeds back a working process, a conveying speed is controlled by virtue of frequency modulation of a stepping motor, bidirectional throttle valves and one-way throttle valves are adopted for regulating speed during the reciprocating motion of a hole pressing cylinder and a correcting cylinder and a gas collecting tube connecting suction needle motion, and directional planting with consistent germination point orientation after planting is realized.