Picasso's cubist portrait paintings have a unique way of creating colors, shapes, proportions, and space. In the past, many researchers have exploited the portrait paintings of cubist artists in general and Picasso's cubist portrait paintings in particular, but few people have mentioned applying that visual style to teaching children. That has helped me, as a teacher and a master's student majoring in theory and teaching methods of fine arts, boldly seek new research directions. Exploiting Picasso's cubist portraits and applying them to thematic art teaching at Nguyen Trai Secondary School, guiding students to practice creating cubist portraits through lessons and experiential activities Organize Seminars.