The objective of the present work was the one to characterize the market of farming insumos of the milk chain of cow in the state of Hidalgo with the purpose of identifying critical necks of bottle or factors that affect their development of the productive chain. The analysis of productive chains and sampling of proportions of Maxima variance was used. To the channels and agents of commercialization were described, as well as the markets of the inputs, identifying themselves that the supplying participate national and transnational companies actively. The balanced foods that are sold are of national origin, the forages are of crazy origin and the veterinary products and reproductive nationals and of companies and laboratories of the foreigner. One concludes that the necks critical factors are related to the nutritional sources (forage and grains), as well as the technical attendance, in addition to the structures of markets some inputs, for example monopolistic competition and oligopoly.