The invention relates to a pressure and displacement measurning device, which belongs to a measuring device, in particular to a pressure and displacement measuring device for packing proton exchange membrane fuel batteries, and the pressure and displacement measuring device is particularly suitable for adjusting the pressure and the displacement for packaging and doing in-situ packaging under the circumstance of monitoring the performance parameters of batteries. The pressure and displacement measurning device comprises a square mobile support platform, a rectangular frame, a power application component, a power transmission component, a guiding component, a pressure measuring component and a compression amount measuring component, wherein the power application component can adopt the modes of manual loading or electric loading, when the manual loading mode is adopted, the power application component comprises a reinforcing handle, a handle link block, a screw rod, a screw rod nut and a pressure adjusting component, and when the electric loading mode is adopted, the power application component comprises a motor, a shaft coupling, a screw rod, a screw rod nut and a pressure adjusting component. The invention has the advantages of simple operation, reliable measurement and strong practicability, which improves the precision and the efficiency of packing and measuring.