The invention discloses a preparation method for an iron-doped compound electrocatalysis material made from hydrogel. The preparation method is characterized by comprising the following steps: mixingmelamine dissolved in water and salicylic acid, and then adding the mixture into a mixture of ferric trichloride and water, thereby obtaining a hydrogel material; freeze-drying and carbonizing the hydrogel material in turn, thereby acquiring the compound electrocatalysis material. According to the invention, a Pt/C compound electrocatalysis material with low cost, environmental protection and electro-catalytic properties is prepared by taking melamine and salicylic acid as raw materials, adding FeCl3 and water and directly mixing to react so as to form the hydrogel under the non-covalent effect. The invention utilizes a three-dimensional pore structure of the hydrogel, so that O2 more easily approaches to an active site; a carbon-nitrogen doped structure is introduced into the raw materialmelamine, so that the ORR electrocatalysis property is improved and the specific area of the carbonized product participating in catalysis is increased; the catalytic effect is excellent; oxygen reduction reaction is effectively accelerated.