Ultrahigh piezoelectric response along easy cleavage plane in BaTiO3 singl e_crystal was found. An extremely high value of piezoelectric coefficient d 33 value over 2000 pC/N was obtained after being poled perpendicular to th is plane of BaTiO3 crystal, which is more than 20 times higher than those poled along spontaneous polarization direction 〈001〉 (d33〈001〉=87p C/N). A large strain of 06% was obtained at a very low electric field. The res ults may generate a wide range of lead_free materials for the piezoelectric tran sducer application.