Packing box

A packaging box, comprising:

• a first box body, comprising a first accommodating part having a first accommodating cavity and a first opening communicating with the first accommodating cavity in a first direction;
• a connection assembly comprising a pair of connecting plates that are distributed opposite to each other on two sides of the first box body in a second direction, wherein the second direction intersects with the first direction;
• a second box body connected to one plate of the pair of connecting plates and having a second accommodation cavity;
• and
• a third box body connected to the other plate of the pair of connecting plates and having a third accommodation cavity;
• wherein the packaging box is configured to switch between a first state to close the first opening and a second state to open the first opening;
• wherein the pair of connecting plates comprise a pair of first plates and a pair of second plates that are in bending connection, the second box body is connected to one of the pair of second plates, and the third box body is connected to the other of the pair of second plates;
• and
• wherein in the first state, a length of the pair of first plates in the first direction is the same as a length of the second box body or the third box body in the second direction.