The present invention discloses a copper wire adjustable tension winding system for transformer bobbin production. The system comprises a winding apparatus, and a copper wire tension adjusting apparatus. The winding apparatus comprises a winding fixed plate, a plurality of wire-wound rods, a plurality of fixed seats, and a plurality of sleeves, and the copper wire tension adjusting apparatus comprises a fixed tension adjusting plate, and a plurality of tension adjusting seats. The beneficial effects of the system disclosed by the present invention are that copper wire winding of a transformer bobbin sleeved on an insert block can be completed through rapid rotation by the wire-wound rod, the sleeve is provided with a groove and a ball inside which have two functions with one function that friction and damage between the sleeve and the wire-wound rod can be reduced through sliding cooperation; and a hierarchical tension adjusting effect can be achieved through two springs with different elasticity, and with elasticity from maximum to minimum since a copper heading for a return spring.