Chemical softening device for fracturing flowback liquid

The utility model discloses a fracturing flowback liquid chemical softening device which comprises a softening tank, a plurality of main partition plates are arranged in the softening tank at intervals, the softening tank is sequentially divided into a first reaction tank, a second reaction tank, a third reaction tank and a fourth reaction tank by the main partition plates, and secondary partition plates are arranged in the first reaction tank and the fourth reaction tank. The first reaction tank is sequentially divided into a pH adjusting tank and a magnesium agent reaction tank by the secondary partition plate in the first reaction tank, the magnesium agent reaction tank is communicated with the second reaction tank, the fourth reaction tank is sequentially divided into a PAC reaction tank and a PAM reaction tank by the secondary partition plate in the fourth reaction tank, the PAC reaction tank is communicated with the third reaction tank, the pH adjusting tank is connected with a water inlet pipe, the PAM