The invention relates to a padding device of a multifunctional vegetable seedling raising machine. The padding device comprises a rack, a bottom plate, a support frame, a padding mechanism, a matrix box, a conveying mechanism, a speed reducer and a main motor, wherein transmission drums are arranged at the front and rear ends of the rack and are connected by a conveyor belt; the bottom plate is arranged at the top of the rack and is used for installing the support frame; the support frame is used for supporting the padding mechanism; the padding mechanism comprises a padding shaft, eccentric wheels, connecting rods, pad bearing blocks, swing handles, a swing shaft and a padding plate; the conveying mechanism comprises conveying motors, the conveyor belt, the transmission drums and tensioning components; and the main motor is connected with the speed reducer by a coupling. The padding device can ensure the controllability of the matrix padding quantity, has a simple integral structure and strong practicability, is convenient to manufacture and is easy to popularize and use.