The Lagrangian interpolation filter can be applied to calibrate TIADC time error. This method has good calibration effect. However, the order of the Lagrange interpolation filter is not easy to adjust, which makes the filter not flexible in practical application. To address the problem, this article proposes a TIADC time error calibration method based on the Aitkin stepwise interpolation filter. To apply Aitkin stepwise interpolation algorithm to time error calibration, this article simplifies the calculation formula of Aitkin interpolation polynomial and designs a method for picking new interpolation nodes. The method can automatically adjust the order of the Aitkin stepwise interpolation filter according to the input signal frequency of the TIADC sampling system and the set precision requirement. Simulation results show that the calibration method can efficiently suppress the spurious components induced by the time error within 90% of the Nyquist frequency band, and can automatically adjust the filter order. When the normalized frequency of the input signal is 0. 35, the calibrated SNDR is improved by 40. 37 dB. The effectiveness of this calibration method is verified through experiments.