Manouchehr Niazi is renowned for his landscape paintings, particularly focusing on the intricate beauty of trees. His artistic journey began during his teenage years under the tutelage of renowned mentors such as Ali Asghar Petgar, Hossein Sheikh, Mahmoud Olia, and Ahmad Esfandiari. Deepening his commitment to painting, Niazi furthered his education at the Kamal Ol Molk Conservatory. Subsequently, he pursued studies in art history at Queen's College, New York, in the United States. Niazi inaugurated his artistic career with a solo exhibition in Beverly Hills, marking the onset of a prolific exhibition history that has seen his works displayed in numerous solo and group exhibitions both in Iran and internationally. After an extensive period living in the United States, Niazi returned to Iran to continue his artistic endeavors.

Trees stand as the primary motif in Niazi's paintings, depicted in vast numbers, seemingly boundless in their growth from the earth to the heavens. His large-scale canvases reflect his profound connection with nature, enhancing its enigmatic allure through the portrayal of dense clusters of trees. While devoid of human presence, some art experts interpret the abundant foliage in Niazi's works as symbolic of resilience, subtly critiquing human existence.

Reflecting on his artistic philosophy, Niazi emphasizes the omnipresence of art in the world, attributing artistic expression to various facets of human endeavor. He asserts, "We are not viable in the world without creating art. Everything is art. Even a baker, who shapes the dough, is painting." For Niazi, the essence of true artistry lies in the pursuit of form. He believes that every aspect of existence embodies the essence of painting, underscoring the pervasive nature of artistic expression in our lives.