The work aims to explore the potential and ways to apply AIGC-supported human-AI co-creation to art education for preschoolers (ages 3-6) and foster children's artistic creativity. Based on the background of the integration of preschoolers's art education and AI, the opportunities and potential of AIGC application to art education for preschoolers were discussed through the analysis of the current situation of digital-intelligent art education products for preschoolers and the current situation of AIGC's practical application in children's painting expression. Starting from the characteristics of human-computer collaboration, the research case of drawing by human-AI collaboration was analyzed, and the human-computer relationship between AI and children was discussed. It was concluded that AIGC could empower children's drawing creation in three ways, namely, enhancing ability, inspiring creativity and collaborative co-creation. The design strategies of preschoolers's drawing game based on human-computer intelligence collaboration was proposed, i.e., AI could act as a facilitator, inspirer, motivator, co-creation partner, and re-creator at different stages of children's creativity, and a children's drawing game called Artventure was designed accordingly. AIGC has unique advantages in assisted drawing, collaborative creation and inspiration. AIGC-empowered children's art education products not only help to improve children's drawing ability, but also point to the pursuit of personalization and the cultivation of digital literacy of the "α-generation", so as to adapt to the new mode of human-computer collaboration in the future.