The invention discloses a hard disk carrying apparatus comprising a main body, a plurality of slide racks, and a plurality of valves. In the main body, an accommodating space is concavely disposed at a front side of the main body; a plurality of primary slide rails that are adjacent and parallel to each other are disposed on a bottom wall in the accommodating space; a plurality of secondary slide rails is disposed on a top wall in the accommodating space. Each of the plurality of slide racks is a long rack. Each of the plurality of valves is a long door plate member. An end of each valve is a pivot end that is pivotally installed at a bottom edge of the front side of the main body; the other end of the valve is a latch end that includes a locking element disposed thereon.