NOVELTY - A potassium-containing rock comprehensive utilization method is performed by pretreating potassium-containing rock, crushing to 100-200 mesh, mixing with 8-30% hydrochloric acid at ratio hydrochloric acid to crushed powder of 1:0.3-5, heating in reaction container for 0.5-2 hours, performing solid-liquid separation to obtain solid A and liquid A, adding liquid A with neutralizing agent, separating, drying to obtain iron (III) hydroxide (Fe(OH)3) and calcium chloride (CaCl2), adding 10-35% fluoride salt in solid A at ratio fluoride salt:solid of 1:(0.6-12), uniformly mixing, and heating.    USE - A potassium-containing rock comprehensive utilization method (claimed).    ADVANTAGE - The method consumes low energy, reduces equipment costs, has high fluoride recovery and recycling rate, is environment-friendly and simple, and potassium ion has good absorption performance, high surface area, and is low cost.    DETAILED DESCRIPTION - A potassium-containing rock comprehensive utilization method is performed by pretreating potassium-containing rock, crushing to 100-200 mesh, mixing with 8-30% hydrochloric acid at ratio hydrochloric acid to crushed powder of 1:0.3-5, heating in reaction container for 0.5-2 hours, performing solid-liquid separation to obtain solid A and liquid A, adding liquid A with neutralizing agent, separating, drying to obtain iron (III) hydroxide (Fe(OH)3) and calcium chloride (CaCl2), adding 10-35% fluoride salt in solid A at ratio fluoride salt:solid of 1:(0.6-12), uniformly mixing, heating in reaction container for 5 hours, performing solid-liquid separation to obtain solid B and liquid B, adding liquid B with neutralizing agent to obtain white carbon black suspension, separating to obtain white carbon black and fluoride salt, using fluoride salt for treating solid A, adding solid B with conversion agent, filtering to obtain sodium metaaluminate and solid C, and adding solid C with releasing agent.    DESCRIPTION OF DRAWING(S) - The drawing shows a process flow diagram of the potassium-containing rock comprehensive utilization method. (Drawing includes non-English language text).