In order to achieve high precision

it needs to ensure that there is no cycle slip in the observational data when using GPS carrier phase to carry out attitude measurement.So it is a key issue to detect and repair cycle slips exactly during GPS attitude measurement.By analyzing and comparing general methods of cycle slips’detection

using the method of ionosphere residual to detect cycle slips

and at the same time

proposed a way to recover cycle slips based on the method of fitting.The method can resolve the problem of multi-value when using the method of ionosphere residual to detect the cycle slips less than 1 cycle and more than 10 cycles

as well as to distinguish and repair the carrier phase value where cycle slips happened.Real measuremental data is given to validate the efficiency and feasibility of method.