Abstract: Multiwavelets constitute a new chapter which has been added to wavelet theory,possess different properties from scalar wavelets.It is crucial for multiwavelets to choose a good prefilter which can provide a good approximation to the initial signals.In this paper,an approach to the construction of orthogonal balanced filter is proposed,and experimental results of the image coding by the approach prove that its performance is higher than GHM and CL multiwavelets,closer to or higher than 9/7 scalar filter without any prefilter.