The invention provides alkaline zinc-manganese cell zinc powder and a preparation method of the alkaline zinc manganese cell-use zinc powder. The zinc powder is divided into five parts according to particle diameters, wherein the particle diameter of the first part is larger than 300 micrometers, the particle diameter of the second part is in a range of 300 micrometers-150 micrometers, the particle diameter of the third part is less than 150 micrometers and is larger than or equal to 105 micrometers, the particle diameter of the fourth part is less than 105 micrometers and is larger than or equal to 75 micrometers, and the diameter of the fifth part is less than 75 micrometers. According to the alkaline zinc-manganese cell zinc powder, size composition is evenly distributed and is different from traditional distribution of traditional alkaline zinc-manganese dioxide cell zinc powder, heavy load discharge performance of a prepared and obtained LR6 alkaline zinc-manganese cell is increased by more than 30% compared with traditional zinc power, and medium-small current discharge is increased by more than 5%.