Delay phase-locked circuit and method for automatically adjusting initial delay of delay phase-locked loop

The invention discloses a delay phase-locked circuit and method for automatically adjusting initial delay of a delay phase-locked loop. An input clock signal line is connected with an initial delay adjusting unit. The output end of the initial delay adjusting unit is connected with a phase discriminator and a first delay chain. The output end of the first delay chain is connected with an output clock signal line. The output clock signal line is connected with the initial delay adjusting unit and the first delay chain. The output end of the phase discriminator is connected with a logic control circuit, and the output end of the logic control circuit is connected with the first delay chain. The total phase difference of a feedback clock and an input clock is judged according to an output of a total phase difference detection unit, a counting unit quantifies the total phase difference of the feedback clock and the input clock to obtain step number needing phase difference adjustment, and all total phase differences are omitted to perform quick locking through a second delay chain within a period.