The invention discloses a welding device with a telescopic structure for agricultural machinery, which includes an anti-scalding workbench, an all-round telescopic welding device of an anti-splash high-energy fluorescent heat dissipation type, a pressure-touch induction safety multi-level tool storage device, a storage box and Height adjustment device. The invention belongs to the technical field of welding equipment, and specifically provides a principle based on the anti-Stokes effect, which uses a low-energy pump laser to excite a light receiver, and the light receiver emits high-energy fluorescence, which will directly contact with the welding arm The original energy of the light receiver is taken out of the welding arm and emitted to achieve the cooling effect, but the cooling efficiency of the light receiver is limited, so that the welding temperature of the welding arm will not be too low, adjust the welding arm to a suitable welding temperature, It can ensure the safety of the welding process of the staff and a better working environment. The telescopic welding arm can achieve the effect of all-round position change. It is a welding device with a telescopic structure for easy-to-use agricultural machinery.