The invention relates to a planting device for seedlings, and in particular relates to a high-efficiency planting device for the seedlings. The technical problem to be solved by the invention is to provide the high-efficiency planting device for the seedlings, wherein the device can efficiently plant the seedlings and has simple operation steps, and the seedlings are not easy to damage. In order to solve the above technical problem, the invention provides such a high-efficiency planting device for the seedlings: the device comprises supporting legs, a placement board and the like; and the placement board is horizontally connected to the supporting legs, a rotating mechanism is installed in the middle of the top of the placement board, the right side of the top of one left side supporting leg is horizontally connected with a fixing board, the upper part of the right side of the fixing board is provided with an operation circular table, and the middle of the bottom of the operation circular table is connected with a moving part of the rotating mechanism. According to the device provided by the invention, the rotating mechanism, a conveying mechanism and a soil adding mechanism cooperate with each other, the seedlings placed in a seedling cylinder are planted, and at the same time, optimization of a positioning mechanism is utilized, so that the effects that the seedlings can be efficiently planted, the operation steps are convenient, and the seedlings are not easy to damage are achieved.