Single-mast single-pulley block hoisting derrick

The utility model relates to a hoisting derrick, and in particular to a single-mast single-pulley block hoisting derrick which comprises a main inclined support, an auxiliary inclined support, a head sheave platform, a main inclined support hoisting point, auxiliary inclined support hoisting points and a mast, wherein the main inclined support hoisting point is welded on the main inclined support head sheave platform; the bottom end of the support leg of the main inclined support is fixed through a hinge; the top of the mast is connected with the main inclined support hoisting point through a set of pulley block; the main inclined support is hoisted through the main inclined support hoisting point and the pulley block; the auxiliary inclined support hoisting points are welded on the main inclined support; the auxiliary inclined support is hoisted through the main inclined support and the pulley block connected between the main inclined support and the auxiliary inclined support. Due to the adoption of the single-mast single-pulley block hoisting derrick, the problems that a conventional double-mast double-pulley block hoisting derrick is unbalance in hoisting force conduction when two sets of pulley blocks act cooperatively to hoist, is tedious in construction procedure, large in construction intensity, high in labor and material investment and high in cost, pulleys of a conventional single-mast hoisting derrick can be eccentrically abraded easily in the hoisting process, even edges of some pulleys are damaged by too large stress and great potential safety hazard can be caused to construction safety can be solved.