The present invention discloses a positioning structure of planting device, which comprises a guiding tube, a soil poking mechanism disposed at the bottom end of the guiding tube, a grip bar mechanism respectively connected with the guiding tube and the soil poking mechanism, and a positioning plate disposed on the outer periphery of the soil poking mechanism. The soil poking mechanism comprises a soil retaining plate and a soil poking plate pivoted with and received within the soil retaining plate. The grip bar mechanism comprises a fixed grip bar and a moveable grip bar symmetrically and vertically disposed on two sides of the guiding tube, wherein the moveable grip bar is connected with the soil poking plate coupled with the soil poking plate to swing between a first position and a second position. The positioning plate has two symmetrical tapered blade sides and a shovel body respectively connected with each tapered blade side. The bottom tip of the shovel body has a height difference relative to the bottom end of soil poking plate. While inserting the soil poking mechanism and the positioning plate into soil, the contact surface between positioning plate and soil is far larger than the action surface of the soil poking plate, so as to provide the support force during actuation of soil poking plate to ensure the soil only being poked by the soil poking plate toward a predetermined direction.本發明係揭露一種植物種植器之定位結構,其包括一導引管、一設於導引管底端之撥土機構、一分別連接導引管及撥土機構之握桿機構、以及一設於撥土機構外周緣之定位板。該撥土機構,包含一擋土板、以及一樞接並容置於擋土板內之撥土板。該握桿機構,包含對稱立設於導引管兩側之固定握桿與活動握桿,其中,活動握桿與撥土板連接,並連動該撥土板於第一、二位置間擺動。該定位板,具有兩對稱之錐刃側部,以及一連接各錐刃側部之鏟本部,該鏟本部底尖端相對於撥土板底端,具有一高度差。藉由撥土機構與定位板插入土壤時,定位板與土壤之接觸面遠大於撥土板作用面,而提供撥土板作動時之支撐力,確保土壤只能被撥土板朝一預設方向撥動。1‧‧‧導引管2‧‧‧撥土機構3‧‧‧握桿機構4‧‧‧定位板
