The utility model discloses an adjustable aquaculture net cage. The adjustable aquaculture net cage comprises a cage body, a cross brace which is distributed in the middle is arranged on the box body;a hanging ring is arranged in the middle of the transverse support; floating blocks are arranged on the two sides of the box body respectively. A fixed rod vertically inserted into the water bottom is arranged beside the floating block; the floating block is slidably connected with the fixed rod through a connecting sleeve rod; balancing weights are arranged below the floating blocks respectively, and vertically-distributed connecting rods are arranged on the floating blocks respectively. Sheaths are sleeved on the floating block and the balancing weight; a cross beam is arranged between theconnecting rods; a hanging ring distributed opposite to the hanging ring is arranged in the middle of the cross beam; and a rope is arranged between the hanging ring and the hanging ring. The aquaculture net cage is reasonable in structure, the wading depth of the aquaculture net cage can be freely adjusted to cope with various natural conditions such as weather and water level, the floating bodyis wrapped by the special sheath and cannot be damaged and aged, and the technical problem that an aquaculture net cage in the prior art is inconvenient to use is effectively solved.