The utility model discloses a winding former for a transformer coil. The winding former for the transformer coil comprises a first end board, a second end board and a plurality of supporting strips with two ends fixed on the first end board and the second end board respectively, wherein the second end board is composed of an upper end plate and a lower end plate that are spliced together; a clearance is reserved at the splicing end of the upper end plate and the lower end plate; at least one pair of clamping plates are arranged on the second end board and are perpendicularly fixed in corresponding positions of the upper end plate and the lower end plate respectively; screw holes are formed in the clamping plates; regulation bolts are mounted inside the screw hole; two positioning nuts are arranged between the clamping plates on the regulation bolts; one clamp nut is arranged on the outer side of each clamping plate respectively. By adopting the winding former for the transformer coil provided by the utility model, the disassembly of the winding former is enable to be simple and convenient, and the operation is convenient.