Research on probes for transient electromagnetic detection technology. Firstly, the principle of transient electromagnetic technology is introduced, and the advantages and disadvantages of several kinds of focusing probes are analyzed. Then, a new type of transient electromagnetic focusing probe structure is proposed according to the design requirements, which solves the shortcomings of transient electromagnetic probes, such as non-focusing, low energy and heavy equipment. Finally, The finite element simulation is used to verify the focusing effect of the new focusing probe, and compared with the traditional coil simulation results, the results show that the new focusing probe focuses the main energy of the magnetic field at a radius of less than 0.3 m, which is 40% smaller than the traditional coil magnetic field distribution, and the magnetic induction intensity. B=1.499 8×10-5, which is 19.3% higher than the traditional coil induction intensity, and the focus probe has a larger gradient of magnetic induction intensity distribution than the conventional coil. It provides an effective reference value for optimizing the design of transient electromagnetic technology probes and accurately measuring the corrosion of metal pipes. It also provides a basis for the extended application of this technology in pressure pipes and heat pipes.