Abstract: In this paper,mid-rise shear wall with concealed truss has been brought forward.This new composite shear wall includes two kinds of composition.One is composition of two bearing systems,including truss and shear wall,the other is composition of two materials,including steel and concrete.So it is a double composite shear wall.The experimental study on the seismic behavior of six 1/3 scale mid-rise shear walls, including a usual mid-rise shear wall,a mid-rise shear wall with steel frame and four mid-rise shear wall with concealed truss made of different materials,has been studied.Based on the experimental study,the stiffness and its attenuation,bearing capacity,ductility,hysteretic property,energy dissipation and failure phenomena of each shear wall are contrastively analyzed.The formulas of bearing capacity and stiffness are established. The results obtained from the formulas and those from experiment are in good agreement.Some suggestions for seismic design of shear wall have been put forward to in this paper.The experimental results show that the seismic behavior of the mid-rise shear wall with steel frame and every truss with different materials have been obviously improved.