Packaging tray

A packaging tray, comprises:

• a base plate with two first sides and two second sides, the two first sides being opposite to each other, the two second sides being opposite to each other and located between the two first sides;
• two first side plates being bendable relative to the base plate and connected to and erected on the first sides of the base plate, respectively, each of the first side plates comprising a first base body and two first combining areas, the first combining areas connected to two sides of the first base body which are opposite to each other, respectively, and each of the first combining areas having at least one opening being separated from edges of the first combining area by a distance;
• and
• two second side plates being bendable relative to the base plate and connected to and erected on the second sides of the base plate, respectively, each of the second side plates comprising a second base body and two second combining areas, the second combining areas connected to two sides of the second base body, respectively, each of the second combining areas comprising a head part and a neck part, the head part and the second base body connected via the neck part, the head part being wider than the opening, the neck part being narrower than the opening, the first combining areas of the first side plates overlapped with the second combining areas of the second side plates adjacent to the first combining areas of the first side plates, respectively, and the head parts piercing through and fixed to the openings, respectively, so that the first combining areas are attached with the second combining areas, respectively;
• wherein the base plate, the first side plates and the second side plates are formed into a single unit.