Fire welding device

The invention relates to a fire welding device. The fire welding device comprises a main body unit used for making direct contact with a supporting platform; the fire receiving unit is used for collecting target dangerous objects generated in the welding operation process; and the hoisting unit is used for connecting the main body unit and the fire welding unit. The accommodating part of the fire receiving unit can be connected to the main body unit through a plurality of connecting rod parts arranged on the hoisting unit; therefore, a bearing part, arranged on the supporting platform, of the main body unit can drive the containing part to move to a designated position in the mode of adjusting the vertical height and/or the horizontal direction through the first translation assembly and/or the second translation assembly, the multiple vertical plate assemblies arranged on the containing part moving to the designated position can slide to the corresponding fixed objects to abut against the fixed objects in the