A kind of copper electrolyte

The invention discloses a kind of copper electrolytes, contain leveling agent, copper ion source, electrolyte and halogen ion source, polymer of the leveling agent number average molecular weight distribution as made of one or more nitrogen-containing heterocycle compounds, two kinds or more of multi-epoxy compounds and the reaction of one or more polyamine compounds in 500-20000 in the copper electrolyte；Electro-coppering is carried out using leveling agent of the invention, can be obtained with high thickness to diameter ratio