A problem of conjugation of hyperbolic and parabolic equations in domain wi
th moving boundaries is considered. Existence and uniqueness of a strong so
lution of the given problem are proved. A priori estimate for operator-diff
erence scheme with non-self-adjoint spatial operator is obtain. Homogeneous
difference scheme with constant weights for the conjugation problem is con
structed. Moreover, consistency conditions are approximated with the second
-order of accuracy with respect to spatial variables. Stability and converg
ence of the suggested scheme are investigated.