The invention relates to a colored light consistency dyeing method for wool/nylon blended fabric. The method comprises the following steps: placing pretreated wool/nylon blended fabric into a dye vat, injecting water, adding a dyeing auxiliary agent, running and adding a reactive dye for wool, running for 5-15 min, adding a neutral metal complex dye, running for 5-15 min, stepwise heating, cooling and adding an acid-releasing agent, running and then heating, cooling and draining; injecting water after draining, adding soda ash, and draining; injecting water, adding glacial acetic acid, and draining; injecting water, adding a dye-fixing agent, carrying out thermal insulation at 70 DEG C for 10-30 min, draying, and drying. By one-bath two-stage process for dyeing, the obtained fabric can greatly reach colored light consistency, the defect of uneven dyeing in the prior art is overcome, and the method is beneficial to application and development of wool/nylon blends.