The main works are landscapes, flowers and birds, figures and so on. He studied under famous painters such as Shi Tao, Badashanren and Yangzhou Eight Eccentrics. He carefully copied and studied the masterpieces of the predecessors of modern and contemporary calligraphy and painting, and his landscape works were organically combined with the methods of Zhang Daqian, Fu Baoshi, Huang and Liu Haisu, forming his own unique painting style. Calligraphy also absorbs the essence of Yan Zhenqing, Dong Qichang, Mi Fei and Wang Duo from traditional inscriptions and applies it to his calligraphy creation, which has a certain influence in the fields of prose and poetry other than calligraphy and painting.
He devoted himself to the creation of ink and wash works, and explored and studied the spiritualization and nationalization of his works. He tried to combine the intuitive and vivid description of nature in western painting, the rich and delicate color of oil painting with China's traditional artistic spirit and aesthetic ideal, which reflected the extraordinary artistic realm. He is good at expressing natural scenery, such as new green in early spring, cottages by the water, black tiles and white walls, harmonious and fresh colors, quiet and light beauty, which makes the picture lyrical. Many art critics say that "Zhang Yikong's works contain intangible and endless shocking power, which will leave a deep imprint on people's hearts".
In the creation of Chinese painting, Zhang Yikong tried to express the modern spirit with the traditional materials and tools of China, and explored the innovation of Chinese painting. His ink painting is novel in conception, unique in composition and special in aesthetic feeling. He is good at presenting poetic and picturesque ideas to everyone through the interweaving of points, lines and surfaces. He likes and is good at simply describing objects and expressing the wonderful rhythm and corresponding spiritual feelings of nature in a semi-abstract form. It is not only rich in oriental traditional taste, but also has the characteristics of the times, which is different from others and makes the viewers feel refreshed.