The invention discloses a method for manufacturing a shell of an electronic controller for a vehicle. The method comprises a step of manufacturing a mould, a step of die-casting, a step of removing material handles and sludge ladle from a blank, a step of removing burrs, a step of vibration grinding, a step of testing air-tightness, a step of checking flatness and position of a mounting hole, a step of washing and drying and a step of warehousing finished products. The method adopt high-tech means to ensure design of the mould and high manufacture precision, and selects proper die-casting equipment to ensure small deformation of a formed product. Through the step of vibration grinding, proper vibration grinding equipment, a grinding material, washing agent and proper process parameters are selected, after the surface of the formed product is washed, the product has high cleanliness (surface tension reaches 56mN/m) and high dimension precision; actual operation process parameters are set for key steps, such as die-casting, grinding, washing and the like so that the method adapt to standard production and mass production of the products.