Rice transplanter is an agricultural machinery that implants rice seedlings into rice fields. When planting, first use a mechanical claw to take out several rice seedlings from the seedbed and implant them into the soil in the field. In order to maintain a right angle between the seedbed and the ground, the front end of the mechanical claw must take an elliptical action curve when moving. Actions are accomplished through planetary mechanisms with rotating or variable gears, and the forward engine can also drive these mechanical actions. The rice transplanter must have anti-skid wheels and floating design when traveling on soil. If the seedlings are planted in patches, they are taken out from a specific seedling box and then mechanically planted.