In The Hairy Ape, at first Yank identifies himself as"steel"and Mildred declares herself as"waste product", which pos-its themselves like the polar of the flow line production. While from each other's point of view, they are both"hairy apes". Through spatial interpretation, it is noticeable that the identity crisis they both suffer results from a loss of self-space in the capitalized space caused by capitalist mode of production. Both Yank and Mildred make active efforts to produce their own self-space upon re-alization of the absence, which are doomed to failure. Ultimately, the tragedy originates from the impossibility of producing self-space in capitalized space.