Abstract: This paper proposes a modified approach to design of two dimensional windowed all phase image filtering templete，based on the concept of all phase data space，and a design of 2D all phase image filtering templete with window.It is a FIR filter design scheme possessing concurrently the merits of the conventional windowing and the frequency sampling.On taking full account of equivalence condition of circular convolution and linear convolution，in this paper，the authors give the custom design method of the all phase filter.Which insures that the all phase filter to be designed has excellent properties and makes much consistencies with filter prototype that has been proposed ahead.Theoretical analysis and simulation experiment show that it has the advantage of frequency sampling in the overall filter performance，and features its narrow transition bandwidth，high roll-off and deep stopband attenuation，with which to remove effectively block artifact and improve evidently image quality.