Suspension arm assembly of highway and railway dual-purpose crane and crane

The invention relates to a suspension arm assembly of a highway and railway dual-purpose crane and the crane. The suspension arm assembly of the highway and railway dual-purpose crane comprises a cargo boom (1); the boom head (2) is mounted at one end of the cargo boom (1); the rigid component (5) is connected with the boom head (2) and extends in the extension line direction of the cargo boom (1), and a connecting part (53) used for being directly connected with a lifting appliance (7) is arranged at the end, away from the boom head (2), of the rigid component (5). The arm head (2) is directly connected with the lifting appliance (7) through the rigid component (5), so that the problem that the lifting appliance is lifted to the ground by a limited height due to the fact that the arm head is connected with the lifting appliance through a pulley block in the prior art is solved. 本发明涉及一种公路铁路两用起重机的吊臂组件和起重机。公路铁路两用起重机的吊臂组件包括：起重臂(1)；臂头(2)，安装在所述起重臂(1)的一端；刚性部件(5)，与所述臂头(2)连接，并沿所述起重臂(1)的延长线方向延伸，所述刚性部件(5)的远离所述臂头(2)的一端设