Based on the theory of quantum information transfer in spin chain, the effects of two types of magnetic field are investigated for a single qubit information transfer in spin chain with N=4. For the spin chain in magnetic fields, Hamiltonian of the system is diagonalized, and the dynamic behavior of information transfer is considered in magnetic field. Results show that the low-intensity magnetic field which is uniform in space and constant in time has nothing to do with quantum information transfer. The low-intensity magnetic field with the difference value B between the nearest-neighbor lattices and the symmetrical direction to center of the spin chain plays a key role for quantum information transfer. Particularly, for the perfect transfer with fidelity value of 1, the transferring condition is dependent on the magnetic parameter B to a great extent.