The invention provides a secondary battery electrode manufacturing method. The method solves the problem existing in existing secondary battery electrode dry preparation techniques that both side edges of an electrode frame mesh are difficult to powder to result in short circuit. The method comprises the steps of obtaining a porous frame, wherein the porous frame is a metal mesh belt, and both side edges of the porous frame are bent towards the center; continuously feeding the porous frame through a powder tank filled with active substance powder to fill the active substance powder into the mesh holes and the surface of the porous frame, then discharging the porous frame out of the discharging port of the powder tank, and pressing both sides of the porous frame to adhere the active substance powder onto the porous frame; cutting off one of the bent side edges of the porous frame; cutting the porous frame into electrodes. The invention also provides a battery cathode prepared through the secondary battery electrode manufacturing method. The secondary battery electrode manufacturing method can effectively reduce the risk of short circuit of batteries and improve the discharging capacity.