The invention discloses apparatus for cleaning dirt on the surface of a squid egg-attaching base, and aims at providing apparatus for cleaning dirt on the surface of the squid egg-attaching base, wherein the apparatus can automatically clean attachments on a net cage of a net-cage squid egg-attaching base for effectively reducing the labor intensity, and enables cyclic utilization of the net cage of the net-cage squid egg-attaching base. The apparatus comprises a floating cleaning device and suspension type net cage installing device; the floating cleaning device comprises a floating frame which floats on the sea surface, a vertical floating sleeve which is located under the floating frame, a first connecting unit which connects the floating frame with the vertical floating sleeve, a first clump weight which sinks to the seabed and a first connecting rope which connects the floating frame and the first clump weight; a plurality of cleaning bristles are arranged on the inner side surface of the vertical floating sleeve; and the suspension type net cage installing device comprises an installing floating block, a second clump weight which sinks to the seabed, a second connecting rope which connects the installing floating block with the second clump weight, and a net-cage position limiting mechanism arranged on the second connecting rope.