The utility model discloses a bell of hoist easy to assemble is to open pit furnace, the outside of bell is equipped with the track that is parallel to each other, be equipped with two relative railcars on this track, on the frame of every railcar is fixed in the track through the wheel that the multiunit is relative respectively, it is fixed through the connecting axle between the relative wheel of every group, one of them connecting axle is connected with the motor of marcing through drive mechanism, the frame middle part of every railcar is equipped with lead screw elevating system respectively, this silk pole hoist constructs and bell fixed connection, the frame top of every railcar do not is equipped with the trapezoidal support frame, be equipped with U type spacing groove on this trapezoidal support frame, the one end of hoist hangs U type limiting groove relative in two railcars, the other end of hoist extends to the inside of furnace body through the connecting rod. The utility model discloses the preparation cost is lower, production efficiency is higher and the safety in utilization is better, can convenient and fast hang the hoist in the furnace body operation convenient and fast, labour saving and time saving.