The invention discloses a placing boom control method. The placing boom control method comprises the steps that a two-dimensional absolute coordinate
system is established on the horizontal plane; a two-dimensional dynamic coordinate
system is established on the horizontal plane, wherein the connection line between the original point of the two-dimensional absolute coordinate
system and the original point of the two-dimensional dynamic coordinate system is an axis of the two-dimensional dynamic coordinate system, the original point of the two-dimensional absolute coordinate system is located on the rotating central point of a placing boom or the
tail end point of the placing boom, and the original point of the two-dimensional dynamic coordinate system is located on a
remote control device; the angles formed between the swinging direction of an operating hand shank of the
remote control device and the coordinate axes of the two-dimensional dynamic coordinate system are obtained; the angle that the two-dimensional dynamic coordinate system rotates relative to the two-dimensional absolute coordinate system is obtained; through coordinate system conversion computation, the angles formed between the swinging direction of the operating hand shank of the
remote control device and the coordinate axes of the two-dimensional absolute coordinate system are obtained to control the
tail end of the placing loom to move. The invention further discloses a placing boom control device and a
concrete pump truck. According to the placing boom control method, the placing boom control device, the
concrete pump truck and a material distributing
machine, the degree of intellectualization is high, operation difficulty of an operator is reduced, and moving accuracy and flexibility performance of the
tail end of the placing loom are improved.