The invention discloses a preparation method for multi-foot-shaped platinum nano materials. The preparation method for multi-foot-shaped platinum nano materials is characterized by comprising the following steps of (1) weighing a certain amount of ethylene glycol solution, performing heat preservation for 50 to 70 minutes in the air and enabling the heat preservation temperature to be between 100 and 120 DEG C; (2) adding a certain amount of polyvinylpyrrolidone ethylene glycol solution and chloroplatinic acid ethylene glycol solution, enabling the mole ratio of the chloroplatinic acid and the polyvinylpyrrolidone to be between 1 to 10 to 1 to 1 and performing heat preservation for 1 to 3 hours to enable the solution to be changed into yellow green from yellow; (3) adding a certain amount of ferrous chloride solution and performing heat preservation for 8 to 12 hours; (4) ventilating protective gases into a reaction container or the reaction liquid with a certain flow to expel oxygen in the ambient environment of the reaction liquid when the thermal preservation is achieved, finally centrifuging the reaction liquid with the speed to be at 9000 to 11000 rounds per minute, washing through the ethyl alcohol for a plurality of times and obtaining a finished product. The preparation method for multi-foot-shaped platinum nano materials has the advantages of being simple in technology and low in cost and enabling shapes and the grain sizes of the multi-foot-shaped platinum nano materials to be controllable and has wide application prospects in the catalysis field.