D0 mixing parameters x and y is estimated in the wrong-sign decay D0→K+π-π0 by time-dependent amplitude analysis. The resolution of the D0 lifetime is essential in time-dependent Dalitz analyses. The Belle Ⅱ detector, which aims to collect a total integrated luminosity of 50 ab-1 of data, has σ=140 fs in Monte Carlo studies, a factor of two improvement over that of Belle and BaBar, so the produced Dalitz signal Monte Carlo samples are smeared with this resolution. Then a time-dependent Dalitz plot fitting is performed on these smeared samples, and the sensitivity of D0-D0 mixing parameters are σx=0.057% and σy=0.049%. These are about an order of magnitude improvement on current experimental results, without considering background effects."> D<sup>0</sup>-D<sup>0</sup> mixing sensitivity estimation at Belle Ⅱ in wrong-sign decays D<sup>0</sup>→K<sup>+</sup><em>π</em><sup>-</sup><em>π</em><sup>0</sup> via time-dependent amplitude analysis -
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