The invention discloses a measuring circuit for data establishing time of storage. The measuring circuit comprises a first D trigger, wherein an output data is sent to a data input end of the storage under the control of the first clock signal; a data output end of the storage is connected with the data input end of a second D trigger and is used for outputting under the control of a third clock signal; a second clock signal is connected with a clock input end of the storage; the third clock signal is connected with the clock input end of the second D trigger; multistage buffers are serially connected into a buffer serial circuit which is used for outputting the first, second and third clock signals and adjusting deviation values among the first, second and third clock signals; the data establishing time of the storage can be acquired by gradually approaching the magnitude setting of the deviation values of the first, second and third clock signals. The invention also discloses a measuring circuit for the data establishing time of the storage. According to the method provided by the invention, the measuring precision can be increased.