The device separates membrane and regular types by filling method, and horizontal and vertical types by tank placement. The foam mixture ratio is typically 3% or 6%, and 8% mixtures for medium foam fire suppression systems can also be provided. The mixing flow rate of the device ranges from 32 to 160 L/S, with storage tank capacities of 1000 to 16,000L in various specifications. Based on the required mixing flow rate and foam injection time, proportioning mixers and foam tanks can be freely combined into a series of products to meet engineering application needs.