The invention provides a manufacturing method for a dustproof feeding box avoiding waste, which comprises the following steps: A, plastic is used for preparing a fodder box and a brace base in an integral formation manner, the brace base is circular platform-shaped and protrudes the circle center position of the circular disc-shaped fodder box; B, plastic is used for preparing a brace, the inside of the brace is hollow, a central column is manufactured at the center position of the brace, an annular support is arranged at the bottom of the central column, the outer part of the support and the brace form a communicated channel, the manufacturing base is sleeved with the support, and the central column is inserted onto the brace base; C, spring shafts are wound on the outer wall of the middle part of the brace, a dustproof board rising and falling bolt is arranged at the upper end of the central column, a steel wire is connected to the bottom of the dustproof board rising and falling bolt, extends downwards along the inside of the brace and is connected with the spring shafts, the upper shafts of the spring shafts are connected with a plurality pieces of dustproof boards which are trapezoid, one ends of the plurality pieces of dustproof boards are connected in series by the spring shafts to form a circular ring shape and are clung to the outer wall of the brace. According to the manufacturing method provided by the invention, the structure is simple, the manufactured product is convenient to use, and fodder waste can be effectively avoided.