The adhesive force of viscose to the surface of nozzle in a coagulation liquid is generally considered to cause the clogging of nozzle hole. An apparatus to measure the adhesive force is showed in Fig.1, 2mg of viscose was put between the pieces and as soon as the pieces with viscose was soaked into coagulation liquid, one piece was pulled down to the tangential direction of it's surface, and the force to tear off the pieces was measured. The adhesive force can be exprsessed with the quotient of the force to tear off the pieces by the perimeter of piece surface.The results were as follows:1. With the increase of concentration, H2SO4 decreased the adhesive force and Na2SO4 and ZnSO4 incrased it.2. With the increase of concentration of surface active agent in viscose or coagulation liquid, the adhesive force decreased but some surface active agents had no influence in the adhesive force of viscose, though they could decrease the surface tension.3. The influence of surface active agents on the adhesive force can be affected by Na2S and Na2CS3. In one case the adhesive force decreased with the increase of their concentration and in another case the adhesive force increased. This shows that there might be a mutual reaction of these salts and the surface active agents, and it might also affect either the adhesion of viscose to the surface or coagulation and regeneration process of viscose.