The invention discloses a boom crane for optimizing a steel rope winding structure. According to the steel rope winding structure, a steel rope is wound out from a first rope guide position of a winding drum in the anticlockwise direction, sequentially wound around a first lower pulley, a first upper pulley, a second lower pulley and a second upper pulley anticlockwise and then sequentially wound around a third lower pulley, a third upper pulley and a fourth lower pulley clockwise, and then the steel rope is wound back to a second rope guide position of the winding drum anticlockwise; the first end of the steel rope is wound around the first end of the winding drum and fixed to a first rope pressing position, the second end of the steel rope is wound around the second end of the winding drum and fixed to a second rope pressing position of the winding drum, and the first rope pressing position and the second rope pressing position are each provided with a rope pressing structure; and each rope pressing structure is provided with a steel rope pressing plate, steel rope pressing grooves are formed in the lower surface of each steel rope pressing plate, and each steel rope pressing plate is fastened in a winding drum body screw hole of the winding drum through a bolt. According to the boom crane, the product performance of the boom crane can be improved.