A pitch apparatus applied in a wind turbine, wherein the wind turbine comprises a wheel hub and a plurality of blades ; wherein the pitch apparatus comprises: a pitch bearing ; a transmission element; a connection plate ; and a driving mechanism for driving the transmission element; wherein the pitch bearing comprises: a bearing inner race ; and a bearing outer race ; wherein the bearing inner race is fixedly connected to the blade , the bearing outer race is fixedly connected to the wheel hub , the transmission element is driven by the driving mechanism , and drives the blade and the bearing inner race to rotate in relative to the wheel hub ; wherein the connection plate comprises the following elements arranged in a radial direction: an inner circumferential portion ; an outer circumferential portion ; and a middle transition portion connecting the inner circumferential portion and the outer circumferential portion , wherein the transmission element is arranged on an outer circumferential surface of the connection plate , and an axial thickness of the middle transition portion is less than an axial thickness of the outer circumferential portion , characterized in that the connection plate is arranged between the bearing inner race and the blade ; or the connection plate is arranged on a periphery of the blade root of the blade , wherein the connection plate is ring-shaped or partially ring-shaped, and the inner circumferential portion is fixed to the periphery of the blade root of the blade . wherein the pitch apparatus comprises: a pitch bearing ; a transmission element; a connection plate ; and a driving mechanism for driving the transmission element; a pitch bearing ; a transmission element; a connection plate ; and a driving mechanism for driving the transmission element; wherein the pitch bearing comprises: a bearing inner race ; and a bearing outer race ; a bearing inner race ; and a bearing outer race ; wherein the bearing inner race is fixedly connected to the blade , the bearing outer race is fixedly connected to the wheel hub , the transmission element is driven by the driving mechanism , and drives the blade and the bearing inner race to rotate in relative to the wheel hub ; wherein the connection plate comprises the following elements arranged in a radial direction: an inner circumferential portion ; an outer circumferential portion ; and a middle transition portion connecting the inner circumferential portion and the outer circumferential portion , wherein the transmission element is arranged on an outer circumferential surface of the connection plate , and an axial thickness of the middle transition portion is less than an axial thickness of the outer circumferential portion , characterized in that the connection plate is arranged between the bearing inner race and the blade ; or the connection plate is arranged on a periphery of the blade root of the blade , wherein the connection plate is ring-shaped or partially ring-shaped, and the inner circumferential portion is fixed to the periphery of the blade root of the blade . an inner circumferential portion ; an outer circumferential portion ; and a middle transition portion connecting the inner circumferential portion and the outer circumferential portion , wherein the transmission element is arranged on an outer circumferential surface of the connection plate , and an axial thickness of the middle transition portion is less than an axial thickness of the outer circumferential portion , characterized in that the connection plate is arranged between the bearing inner race and the blade ; or the connection plate is arranged on a periphery of the blade root of the blade , wherein the connection plate is ring-shaped or partially ring-shaped, and the inner circumferential portion is fixed to the periphery of the blade root of the blade . <EOS>