In order to improving piezoelectric pump’s work efficiency a insulated bimorph with double functions is proposed through processing insulation of bimorph. The insulated bimorph as driving piezoelectric pump’s component can curve on two directions and form the outputs. A double functions piezoelectric pump’s structure is expounded that a insulated bimorph forms two antrums. Some elastic curved surface differential equations of insulated circular piezoelectric composite laminates are derived from the elastic thin plate bending theory with small deflection. The project and course of insulated process of bimorph were introduced and analyzed. The experimental results showed that the Insulated bimorph not only has insulated characteristic but also favorable tenacity and consideration. Its attack voltage advances 20～30V than uninsulated bimorph. A new piezoelectric component with double function is offered for correlative manufacture and scientific research.