Stadium seat cushion

A stadium seat cushion, comprising:

• a seat cushion main body (1) and a backrest (2);
• the seat cushion main body (1) having filling material inside, the backrest (2) being pivotally connected to the seat cushion main body (1);
• the backrest (2) including a support state and a folded state;
• wherein, when the backrest (2) is in the folded state, rotating the backrest (2) away from the seat cushion main body (1) causes it to enter the support state;
• when the backrest (2) is in the support state, rotating the backrest (2) to a position flush with the seat cushion main body (1) causes it to enter the folded state;
• a support frame (3);
• the support frame (3) being connected to a lower surface of the seat cushion main body (1);
• a storage bag (8);
• the storage bag (8) being installed at a front of the seat cushion main body (1), and the storage bag (8) having a rotational degree of freedom relative to the seat cushion main body (1);
• and
• a first connecting strap (13) and a second connecting strap (14);
• the first connecting strap (13 and the second connecting strap (14) being respectively connected to two ends below the seat cushion main body (1);
• the first connecting strap (13) and the second connecting strap (14) being detachably connected to each other;
• and the support frame (3) being provided between the seat cushion main body (1) and the first connecting strap (13) as well as the second connecting strap (14).