Abstract：In order to study characteristics of food web in Cambrain,based on the characteristics of sedimentology and ichnology,14 generas and 18 species trace fossils have been identified in the Mantou formation of Cambrian series 2,3,western Henan. And the food web has been established on the basis of the trace fossils and their trace makers nutrition type. The characteristics of Cambrian food web are summaried as follows:( 1)arthropods were dominated benthonic animals in intertidal zone;( 2) there are abundant food resources in the Cambrian intertidal zone;( 3) less living pressure. The occurrence of abundant arthropod trace fossils,scratch marks and trackways in intertidal provides evidence that arthropods were able to colonize tidal flat zone. Therefore it displayed the ecological space expansion trend of the benthos in Cambrian.

Keyword：Cambrian;intertidal zone;food web;trace fossil;