Composite bactericide of nano platinum chelate and polyhexamethylene guanidine and preparation process

The invention discloses a nano platinum chelate and polyhexamethylene guanidine composite bactericide and a preparation process, the nano platinum chelate and polyhexamethylene guanidine composite bactericide comprises nano platinum chelate, polyhexamethylene guanidine, propionic acid, a stabilizer, a dispersant, a complexing agent and water, the composite bactericide is an aqueous solution, the mass ratio of the nano platinum chelate to the polyhexamethylene guanidine is 1: 25000-1: 150000, and the mass ratio of the nano platinum chelate to the polyhexamethylene guanidine is 1: 25000-1: 150000. The total mass of the nano platinum chelate and the polyhexamethylene guanidine accounts for 3%-8% of the total mass of the solution, the dispersant accounts for 0.2%-0.4% of the total mass of the solution, the stabilizer accounts for 0.2%-0.6% of the total mass of the solution, the complexing agent accounts for 0.6%-1.2% of the total mass of the solution, and the balance is water. The nano platinum chelate is combine