Building block type combined storage device

A building block type combined storage device, characterized by at least comprising:

• a large storage basket group, a small storage basket group and a lid (1), wherein
• the large storage basket group comprises at least one first large storage basket (21) without a first handle (202) and at least one second large storage basket (22) with a first handle (202),
• the small storage basket group comprises 2*n first small storage baskets (31) without a second handle (302) and/or 2*m second small storage baskets (32) with a second handle (302), and
• n and m are all natural numbers greater than or equal to 1;
• wherein, one of the at least one first large storage basket (21) is stacked on any one of another first large storage basket (21), the at least one second large storage basket (22) or the lid (1), one of the at least one second large storage basket (22) is stacked on any one of another second large storage basket (22), the at least one first large storage basket (21) or the lid (1), a bottom of each first large storage basket (21) and a bottom of each second large storage basket (22) are respectively provided with a first frame bottom (210), the first handle (202) is provided with a first auxiliary recess (208), and
• a bottom of the first frame bottom (210) is provided with a first clamping groove mortise and tenon joint structure, the first clamping groove mortise and tenon joint structure comprises a first annular protrusion (211) and four first bumps (212) disposed around the first annular protrusion (211), the first auxiliary recess (208) is configured to embed the first bumps (212), outer edges of the first bumps (212) are disposed corresponding to a first frame (201) at a top of a corresponding one of the at least one first large storage basket (21), and the first annular protrusion (211) is disposed corresponding to the first handle (202).