Rock wool planting bowl tray filling machine and tray filling method

The invention relates to a rock wool planting bowl tray filling machine and a tray filling method. The tray filling machine comprises a material box used for storing rock wool planting bowls, a mold closing device, a jacking push plate, a jacking driving device, a negative pressure suction device and a control device. The mold closing device is located above the material box, and an upper semi-cylindrical groove is formed in the lower end; a box body bottom through hole matched with the cross section of the jacking push plate is formed in the bottom of the material box; the jacking push plate is slidably connected to the through hole in the bottom of the box body, and a lower semi-cylindrical groove is formed in the upper end; the jacking driving device is connected to the jacking push plate and used for driving the jacking push plate to do lifting motion along the through hole in the bottom of the box body, so that the lower semi-cylindrical groove and the upper semi-cylindrical groove ...