The utility model relates to a dropwise add device of saltouing for collagen draws, it includes first dropwise add jar, second dropwise add jar, saltout jar and the solution that is arranged in making the jar of saltouing carries out endless circulation system, first dropwise add jar through first dropwise add pipeline with it links to each other to saltout jar, second dropwise add jar pass through second dropwise add pipeline with the jar of saltouing links to each other, it is provided with the liquid outlet to saltout tank bottoms portion, and the lateral wall of saltouing jar is provided with two of height diverse with liquid mouth last time, circulation system is including the circulation pipeline who is provided with just profound pump, circulation pipeline is provided with two with liquid branch pipe last time, circulation pipeline's feed liquor end with the liquid outlet of saltouing jar links to each other, return the liquid branch pipe with the liquid mouth that returns of saltouing jar links to each other. The utility model discloses simple structure, convenient operation, two kinds of materials of dropwise add simultaneously to under circulation system's effect, the solution of the saltouing mixing that can fully be circulated makes the process of saltouing reduce impurity and appears, improves collagen and draws purity.