Salt of diaminopyrimidine compounds, and solid form thereof, preparation method therefor and use thereof

A salt of compound A,

• which is an inorganic acid salt or an organic acid salt, wherein
• the inorganic acid is selected from the group consisting of hydrochloric acid, hydrobromic acid, hydroiodic acid, sulfuric acid, nitric acid, boric acid, phosphoric acid and any combination thereof;
• the organic acid is selected from the group consisting of formic acid, acetic acid, acetoacetic acid, trifluoroacetic acid, propionic acid, pyruvic acid, butyric acid, caproic acid, heptanoic acid, undecanoic acid, lauric acid, stearic acid, palmitic acid, oxalic acid, malonic acid, succinic acid, glutaric acid, adipic acid, maleic acid, fumaric acid, lactic acid, L-malic acid, citric acid, L-tartaric acid, benzoic acid, salicylic acid, cinnamic acid, naphthoic acid, pamoic acid, niacin, orotic acid, methyl sulfuric acid, dodecyl sulfuric acid, methanesulfonic acid, trifluoromethanesulfonic acid, ethionic acid, isethionic acid, p-toluenesulfonic acid, benzenesulfonic acid, 1,5-naphthalenedisulfonic acid, 2-naphthalenesulfonic acid, camphorsulfonic acid, sulfamic acid, glutamic acid, aspartic acid, gluconic acid, glucuronic acid and any combination thereof.