Currently time-interleaved analog-to-digital converter (ADC) is one of the mo st effective ways to improve the maximum sampling rate of a sampling system,but the channel mismatch error due to the limitations of the production of the system affects the system performance seriously.By using two standard signals in time d omain of oblique waves and sampling the two oblique waves,the points can eliminate offset error s by subtracting the offset error. For time errors and gain errors,they can be calculated by the equations about th em.There are less sampling points and calculation amount for the equation.A fast and accurate algorithm is derived and this algorithm can correct gain errors and time errors. The results show that the error correction system has good performance and the system satisfies the requirements for practical engineering.Using a filter based on Farrow structure,time errors are corrected and the algorithm is pr oved to be feasible by simulation.After correction,spurious free dynamic range ( SFDR) is more than 50dB.