Compensating the environmental magnetic field strictly is necessary for the interference caused by environmental magnetic fields which cannot be ignored disturbing the spin waves for quantum memory in the process of establishing the interface between light and atom. The read efficiency of multiple spin waves generated through the spontaneous Raman process will oscillate with storage time under the interference of external magnetic field in the atomic ensemble with multi-level structure. The oscillation of the readout efficiency with the storage time of magnetic field could be eliminated by magnetic compensation, and a large amount of compensation depends on the high precision magnetic field measuring instrumentstill now. We use multiple level atom ensemble of the Raman processes occurring in the spin wave. The characteristics of the readout signal vary with magnetic field, carrying out the method of using reading efficiency of environmental magnetic field compensation research. Compensating the magnetic field noise in three directions by adjusting the current of the three pairs of coils installed around the magnetic-optical-trap (MOT), the interference disappearing time influenced by the magnetic field of the readout efficiency increases continuously until the storage life exceeds the storage life of zero magnetic, and the oscillation disappearance is the symbol of completing the compensation for the environmental magnetic field. Accurately compensating the magnetic of environmental at the location of the atom to zero is impossible with the residual of measurement and adjustment due to human operation error and external unstable factors by gauss meter. In view of the fact, the above method using atoms as reference frame can compensate the environmental magnetic field more accurately and is helpful for the quantum entanglement distribution efficiently.