The present invention discloses a seedling transplanting device, which comprises: a handheld rod (1); a seedling digging assembly; characterized in that, the seedling digging assembly comprises: a fixed insertion member (2); a movable insertion member (3) with a top and a bottom, the movable insertion member is separated by a space from the fixed insertion member (2); and a driving assembly connected to the movable insertion member, the driving assembly causes the movable insertion member (3) to swing toward the fixed insertion member (2). In the present invention, the driving assembly causes the movable insertion member to swing toward the fixed insertion member, and after the seedling is taken out, the soil with the seedling will not drop out from the bottom of the fixed insertion member and the movable insertion member.