The invention relates to the technical field of transformer production, and concretely relates to a transformer coil winding device. The device comprises a base, a side plate fixedly connected to thetop end of the base and a supporting ring fixedly connected to the top end of the base, the supporting ring is arranged on the right rear side of the side plate, a controller is fixedly connected to the right end of the side plate, and a rotation circle recording mechanism is arranged on the side plate. According to the invention, through the arrangement of a second motor, a right clamping plate,a convex block, a pressing counter and other components in the rotation circle recording mechanism, the accurate calculation of the number of winding circles can be realized, and the practicability isvery good; the second motor drives the right clamping plate to rotate, in the rotation process of the right clamping plate, the right clamping plate rotates for one circle each time, the convex blockon the right clamping plate presses an ejector rod to move downwards, the ejector rod moves downwards to overcome the elastic force of a second spring to press the counter down for counting, and after the convex block slides over the top end of the ejector rod, the ejector rod moves upwards again under the action of the second spring, and the process is repeated, so that counting of the number ofturns of the coil is achieved.