Electrocatalyst for heterogeneous catalytic treatment of refractory landfill leachate as well as preparation method and application of electrocatalyst

The invention discloses an electrocatalyst for heterogeneous catalytic treatment of refractory landfill leachate as well as a preparation method and application of the electrocatalyst. The electrocatalyst comprises the following components in parts by mass: 50-70 parts of steel slag, 25-35 parts of montmorillonite, 20-30 parts of sludge, 10-15 parts of tourmaline and 8-12 parts of crop straws. Thepreparation method comprises the following steps: mixing the components of the electrocatalyst, conducting crushing, granulating, drying and calcining to obtain substrate particles, adding an activator, and carrying out ultrasonic treatment, drying, and calcining to obtain the electrocatalyst. The electrocatalyst can load manganese, can effectively promote electrocatalytic oxidation to remove refractory organic pollutants in landfill leachate, and is good in catalytic activity, high in degradation rate, short in reaction time and extremely low in preparation cost, and the preparation method is simple, convenient and