Abstract: When the transplanting manipulator grabs the seedlings,moving directly from the top of the seedlings to the grabbing position will easily cause damage to the tall seedlings.The problem can be avoided by transplanting manipulator moving down to the working height from seedling side and then horizontally moving to the grab position,this method can reduce the plant height requirements for transplantation.However,during the movement of the transplanting manipulator to the working position,it is easy to collide with the seedlings,resulting in damage to the seedlings.Aiming at this problem,this paper designs a four-tooth telescopic transplanting manipulator that can use positive pressure air flow to guide seedlings and prevent damage to seedlings,Through the fluid simulation analysis of the positive pressure airflow pipeline,it is determined that two positive pressure airflow pipelines are required,and the center distance is 15 mm.An orthogonal experimental to avoid transplanting manipulator damaging seedlings was carried out,experimental results showed that when the positive pressure air flow pipeline inlet pressure was 0.4 MPa,the pipeline inner diameter was 8 mm,and the transplanting manipulator horizontal moving speed was 0.04 m/s.The success rate of preventing anthurium seedlings damage was 98%.