Permeable concrete admixture production adding device

The utility model relates to the technical field of building construction, and discloses a pervious concrete admixture producing and adding device. The mixing device comprises a mixing cylinder, supporting legs and a feeding port, the upper portion of the mixing cylinder is fixedly connected with the feeding port, a first auxiliary material port and a second auxiliary material port are symmetrically formed in the two sides of the feeding port, the first auxiliary material port and the second auxiliary material port are both fixedly connected with the mixing cylinder, and the supporting legs are fixedly connected with the mixing cylinder. A first auxiliary material opening and a second auxiliary material opening are formed in the mixing drum, a group of synchronizing devices are arranged below each of the first auxiliary material opening and the second auxiliary material opening, a mixing device is arranged below the synchronizing devices, and a discharging opening is formed in one side of the mixing device. A