Cold-rolling galvanizing annealing furnace

The utility model discloses a cold-rolling galvanizing annealing furnace which comprises an overaging section chamber, a communicating furnace and a thermal tensioning roller chamber, wherein the bottom chamber of the overaging section chamber is connected with the thermal tensioning roller chamber through the communicating furnace. Dual-phase DP steel is fed into the communicating furnace along the overaging section chamber, is fed into the thermal tensioning roller chamber through the communicating furnace, and is prevented from operation in four passes of an overaging section. Therefore, on the basis that the conventional design of an annealing furnace is maintained, the communicating furnace is added, and the quality of DP steel and TRIP steel can be simultaneously ensured by changing the threading direction of strip steel inside the annealing furnace.