Lead-free and high-temperature piezoelectric ceramics of xBiFeO(3)(1 -x) BaTiO3-1.0 mol% MnO2 (0.67 <= x <= 0.78) (xBF-(1 -x) BT-Mn) were fabricated by the conventional solid-state reaction method, and their hightemperature dielectric, piezoelectric and ferroelectric properties near the morphotropic phase boundary were studied systematically. XRD analysis revealed that xBF-(1 -x) BT-Mn ceramics exhibited pure perovskite structure, and the phase was driven by composition variation from the pseudo-cubic (0.67 <= x <0.70) to rhombohedral (0.70 <= x <= 0.78). The dielectric constant er (1 kHz), dielectric loss tand (1 kHz), Curie temperature T-C, depolarization temperature Td, piezoelectric constant d33, remnant polarization P-r (60 kV/cm) and room temperature planar electromechanical coupling factor k(p) of xBF-(1 -x) BT-Mn ceramics of x = 0.70 were 740, 0.045, 487, 430 degrees C, 35.5 mu C/cm(2), 177 pC/N and 0.37, respectively. The unipolar strain and high field strain coefficient d(33)(star) of xBF-(1 -x) BT-Mn ceramics with x = 0.70 increased up to 0.26% and 652 pm/V at 180 degrees C. Temperature dependence of epsilon(r), tan delta and kp of xBF-(1 - x) BT-Mn ceramics with x = 0.75 was stable from room temperature even up to 500 degrees C. These results indicated that xBF-(1 - x) BT-Mn ceramics were promising candidates for high-temperature lead-free piezoelectric applications.