A method of in situ U-Pb dating of 10-micron-sized zircons using LA-MC-ICP-MS is reported in this paper. The results are in excellent agreement with the previously reported data. The U-Pb ages of I9801 and 05SD07 are (426±2) Ma (n=30) and (1815±10) Ma (n=16) in 10 μm single spot ablasion model, (427±3) Ma (n=32) and (1789±32) Ma (n=15) in 5 μm curve ablasion model. The results are credible and consistent with SHRIMP dating results. Hence it is feasible to carry out 10-micron-sized zircon U-Pb dating using LA-MC-ICP-MS.