Automatic tray loading system and use method of the same

An automatic tray loading system, comprising:

• a stacked tray assembly, comprising at least one tray which is stacked up, and the at least one tray being provided with several locating slots which are configured to limit positions of materials;
• a tray lifting platform, comprising a first tray supporting table which is configured to support the stacked tray assembly and the first tray supporting table being connected with a first elevating mechanism;
• a delivery table, comprising tray placement plates, each of the tray placement plates being provided with a first groove which is configured to place the at least one tray, and each of the tray placement plates being connected with a linear driving mechanism;
• and
• a tray pick and place platform, being supported by a frame and having a working region covers the tray lifting platform and the delivery table, the tray pick and place platform comprising a manipulator which is connected with a multidimensional motion mechanism and is opened or closed to realize grabbing and releasing of the at least one tray;
• wherein an upper surface of the at least one tray is provided with at least one locating block, and a lower surface of the at least one tray is provided with at least one locating slot matching a locating block of a next tray;
• a height of the at least one locating block is less than a depth of the at least one locating slot, and a length of the locating at least one block is less than a length of the at least one locating slot;
• an inner side part of a material slot is steplike to adapt to the materials with different sizes;
• and a grabbing slot for grabbing by the manipulator is provided at a side part of the at least one tray.