Storage box and storage rack

A storage rack, comprising:

• supporting rods;
• a bottom storage box;
• a top storage box;
• and
• at least one middle storage box;
• wherein the bottom storage box, the top storage box, and the at least one middle storage box each defines a plurality of mounting holes thereon for installing ends of the supporting rods, two of the mounting holes defined on the at least one middle storage box are coaxial along a vertical direction, adjacent storage boxes of any two of the bottom storage box, the top storage box, and the at least one middle storage box, are detachably connected through the supporting rods;
• the bottom storage box, the top storage box and the at least one middle storage box are sequentially stacked, and the at least one middle storage box has a structure comprising:
• a bottom;
• a first side wall;
• a second side wall;
• a third side wall;
• and
• a fourth side wall;
• wherein the first side wall, the second side wall, the third side wall, and the fourth side wall sequentially surround the bottom;
• the first side wall is parallel to the third side wall, the second side wall is parallel to the fourth side wall, and the first side wall is perpendicular to the second side wall;
• a first notch is disposed on the first side wall, a second notch is disposed on the second side wall, a width of the first notch is larger than or equal to a thickness of the second side wall, and a width of the second notch is larger than or equal to a thickness of the first side wall;
• and
• the storage rack further comprises a first sliding component and a second sliding component;
• wherein the first sliding component is disposed within the first notch, the second sliding component is disposed within the second notch, and the first sliding component slides along two sides of the first notch to block the first notch, and the second sliding component slides along two sides of the second notch to block the second notch.