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 (10, 40); 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 (10, 40) comprises the following elements arranged in a radial direction: an inner circumferential portion (11, 41); an outer circumferential portion (13, 43); and a middle transition portion (12, 42) connecting the inner circumferential portion (11, 41) and the outer circumferential portion (13, 43), wherein the transmission element is arranged on an outer circumferential surface of the connection plate (10, 40), and an axial thickness of the middle transition portion (12, 42) is less than an axial thickness of the outer circumferential portion (13, 43), 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 (10, 40); and a driving mechanism for driving the transmission element; a pitch bearing; a transmission element; a connection plate (10, 40); 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 (10, 40) comprises the following elements arranged in a radial direction: an inner circumferential portion (11, 41); an outer circumferential portion (13, 43); and a middle transition portion (12, 42) connecting the inner circumferential portion (11, 41) and the outer circumferential portion (13, 43), wherein the transmission element is arranged on an outer circumferential surface of the connection plate (10, 40), and an axial thickness of the middle transition portion (12, 42) is less than an axial thickness of the outer circumferential portion (13, 43), 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 (11, 41); an outer circumferential portion (13, 43); and a middle transition portion (12, 42) connecting the inner circumferential portion (11, 41) and the outer circumferential portion (13, 43), wherein the transmission element is arranged on an outer circumferential surface of the connection plate (10, 40), and an axial thickness of the middle transition portion (12, 42) is less than an axial thickness of the outer circumferential portion (13, 43), 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.