Tower machine standard knot convenient to transport and disassemble and assemble

The invention discloses a tower crane standard knot convenient to transport and disassemble and assemble. The tower crane standard knot comprises stand columns, wherein a cross column is welded and fixed to the joint of the two stand columns, and fixing rings are welded to the surfaces of the stand columns; and second bolts are connected to the inner parts of the fixing rings in a screwed mode, the outer surfaces of the second bolts are provided with second springs inside the fixing rings in a sleeved mode, and the end parts of the second springs are fixedly provided with pressing rings on theouter surfaces of the second bolts. The second springs are designed on the outer surfaces of the second bolts and the pressing rings are designed at the end parts of the second springs on the outer surfaces of the second bolts, so that the situation that loose mounting is prone to cause due to inconvenient pressing and fixing caused by the fact that a standard knot is directly connected through bolts in the screwed mode