Abstract: The method of tritium measurement for irradiated~6Li-Al alloy target by neutron is studied. The measurement is concerned in both the leakage tritium during neutron irradiation and the produced total tritium in the target. The procedure of the leakage tritium measurement is that tritium in the tritium target sample is carried by a mixture of inert gas and hydrogen, then tritium is captured by ethanediol in two catchpots, and the tritium activity in the ethanediol is measured by scintillation counter. The mea-surement procedure of total tritium in the target is that the alloy target is dissolved in NaOH solution, the tritium in gaseous phase is measured by the means of the measurement of the leakage tritium simultaneously, and then the tritium in liquid phase is distillated triply and measured by the scintillation counter. The measured tritium activities is close to the theoretical value.