The paper proves that dichroic atomic vapor laser lock (DAVLL) can ensure that the laser frequency be locked nonresonantly and adjusted continuously, because cesium magnetometer needs a detecting laser to be locked off-resonantly. The ordinary DAVLL theory is introduced and it is pointed out the simple stabilizing frequency method is not appropriate due to cesium complicated energy level construction of hyperfine transition. It′s found out that the zero point of frequency discrimination is relative to the intensity of magnetic field. The dependence of zero crossing on the magnetic intensity experimentally measured by the saturated absorption spectrum. The results show that the laser frequency can be locked and adjusted continuously centered at red-detuning 105 MHz relative to the Fg=4→Fe=5 transition with a range of 50 MHz. The frequency stability is about 3 MHz.