The invention relates to the technical field of soybean machining, in particular to an adjusting method of a blocking component. An arc plate, arc connecting strips, limiting pieces, a roller shaft, arc rods, limiting balls, pressure springs and elastic cloth are included; the arc plate is arranged on the bottom of the inner wall of a seal box, the arc connecting strips are symmetrically arrangedon the outer side wall of the arc plate, a strip groove is formed in the position, above the arc connecting strips, of the arc plate, the four limiting pieces are symmetrically arranged on the side wall of the arc plate, through holes are formed in the limiting pieces, the roller shaft is movably arranged in the strip groove, and is arranged on the upper end of the side wall of the arc plate through symmetric rotating rods, the limiting balls are arranged at one ends of the arc rods, the other ends of the arc rods penetrate through the through holes and the pressure springs to be connected with the rotating rods, and the elastic cloth is arranged on the upper end of the arc plate. The problem that existing screening is not thorough, dead soybeans in the soybeans are hard to treat, and soybean water absorbing expansion is not uniform is solved, the screening effect is thorough, and the soybean water absorbing expansion is more uniform.