The invention belongs to the field of batteries and relates to an electrode pole sheet and an electrochemical device. The electrode pole sheet comprises a current collector and an electrode active material layer arranged on at least one surface of the current collector; the current collector comprises a supporting layer and a conductive layer arranged on at least one surface of the supporting layer; the single-surface thickness D2 of the conductive layer meets a relation that D2 is more than or equal to 30nm and less than or equal to 3 micrometers; a conductive priming coat containing a conductive material and a binder is arranged between the current collector and the electrode active material layer; and the binder of the conductive priming coat contains an acrylic acid group/acrylate group aqueous binder. The electrode pole sheet has good machinability. The electrochemical device comprising the electrode pole sheet has high energy density, good electrical performance and long-term reliability.