Provided is a method for producing a surface-treated steel plate (1), said method comprising: a phosphate compound layer formation step in which a tin-plated steel sheet (10) obtained by plating a steel plate (11) with tin plating (12) is immersed in an immersion treatment liquid containing phosphate ions without performing electrolytic treatment in order to perform immersion treatment and thereby form a phosphate compound layer (20) on the tin-plated steel plate (10); and an aluminum-oxygen compound layer formation step in which an aluminum-oxygen compound layer (30) is formed on the phosphate compound layer (20) by electrolytic treatment using an electrolytic treatment liquid that contains aluminum.
