Abstract: Based on the linear vibration theory, the habit of the steady spurious response curves of nonideal geophones obtained from the measurement by level vibration gauge were examined. For this reason, the existance and the appearance of the variety, the directionality as well as the poor repeatability of the spurious response obtained from the steady vibration test could be well explained on this account. In line with the study mentioned above, it has been pointed out that it is necessary to have a reasonable and practical demand for the vibration gauge and the test condition. In this paper, the factors which have influence on the alias were eximined, the whys and wherefores of the yielding of the alias, the ways and means of increasing the numerical of them were explained.Under the guidance of related theories and by dint of experiments, the quanlity of the SDJ-78 geophones has now come up to the advanced world standards of the same kind.This article could be helpful to the research of the vibration and isolation of the spring hanging rigid bodies.