The invention relates to the technical field of a lithium ion battery, and particularly relates to a manufacturing method for a lithium ion battery pole piece by using a foam metal as a current collector. The invention adopts a slurry pouring or powder forming method to settle the difficulty of a traditional coating process in coating slurry on a surface of a foam current collector and to acquire the lithium ion battery having high energy density and excellent electrical property. The foam current collector has large porosity and slurry can be filled in pores, thereby greatly reducing the space occupied by the current collector inside a battery, being capable of efficiently reducing the layer number of the battery and obviously promoting the energy density of the battery.