Balanced multiwavelets can avoid prefihering. Cardinal multiwavelet is an active field in wavelet research, By relationshi Pbetween balanced order and approximation order in time domain the author investigate interpolatory multiwavelet and show its balanced order is equal to its approximation order. As for general cardinal orthogonal multiwavelet, sampling property and existent condition of its cardinal parameters are studied. Its balanced order is not equal its approximation order in a general way.