The invention discloses a preparation method for series products of polyether amine, which belongs to the technical field of organic chemical industry. Polypropylene glycol, catalyst and promoter are fed into a high-pressure autoclave which is filled with ammonia gas and hydrogen gas in specific quantity, the high-pressure autoclave is heated to a preset temperature and a preset pressure and reacts for multiple hours on the condition of preserving heat, and the materials in the high-pressure autoclave are discharged and filtered after the reaction, filter cakes can be recovered, and colorless transparent polyether amine is obtained after filter liquid is subjected to dewatering. The preparation method is simple in procedures, milder in reaction conditions, low in cost, high in yield of reaction products, selectivity and conversion rate, light in appearance color and easy to be industrialized, and the catalyst can be circularly mechanically used.