The invention relates to the technical field of smelting and screening equipment, and discloses a smelting scum screening device based on mechanical transmission, which includes a first bracket, a first connecting rod is movably installed on the top of the first bracket, and the first connecting rod The bottom end of the bottom is movably connected with a second connecting rod, the top of the second connecting rod is movably connected with an inverted bucket, the inside of the inverted bucket is movably connected with a third connecting rod, the right side of the first bracket is provided with a second bracket, and the second bracket A fourth connecting rod is movably connected to the outer side of the fourth connecting rod, and one end of the fourth connecting rod is rotatably connected with a cam. The smelting scum screening device based on mechanical transmission, through the connection of the first bracket and the third connecting rod, solves the problem that in the existing screening technology, it is necessary to manually load the scum into the transportation equipment so that manual labor The problem of high strength can effectively avoid dust, and there is no need for manual use of tools for rough screening, avoiding human body damage due to poor working environment, and effectively improving efficiency.