A full-space calibration method is proposed,which can be used for fast and high-precision 3D measurement.The one-dimensional grating was projected an d the two-dimensional grating was displayed on the liquid crystal screen being u sed as a standard plane,which moved in the Z direction o f the measurement spac e by being fixed on the translation stage.The gratings were captured by the came ra,and after the truncated phase was calculated,the coordinate relationship be tween the truncated phase and the space would be established.Calibration of dif ferent spatial dimensions can be achieved by changing the grating frequency to a chieve full space calibration.When measuring,the truncated phase is calculated ,and the space coordinate information of the object can be quickly obtained by looking up the table index.The calibration system was built and the effectivene ss of the algorithm was verified by measurement experiments.