By using the extended version of Eshelby-Stroh’s formulation and the method of analyt-ical continuation,the problems of interface cracks are reduced to a Hilbert problem of vector form.Ageneral explicit closed form solution for the piezothermoelastic interface crack problem is then ob-tained,the whole field solutions of temperature,heat flux,displacements,electric field,stress andelectric induction are given,the explicit expressions for the crack opening displacements and electricpotential are also provided. By using the extended version of Eshelby-Stroh’s formulation and the method of analyt-ical continuation, the problems of interface cracks are reduced to a Hilbert problem of vector form. A general explicit closed form solution for the piezothermoelastic interface crack problem is then ob-tained , the whole field solutions of temperature, heat flux, displacements, electric field, stress andelectric induction are given, the explicit expressions for the crack opening displacements and electric potential are also provided.