In order to meet the requirements of solid mineral exploration at the depth of 10m to 30m in offshore of the continental shelf over 100km from the coast belt, and also meet the requirements of CSDP-02 well drilling construction of China Geological Survey “China East Sea Area of Scientific Drilling Project Construction”, according to the past experience and the basis of the research on simple offshore platform, drawing lessons from design concept of large oil drilling platform, a multifunctional shallow sea drilling platform “Tanhai No. 1” was developed. The practical application shows good effects. The platform deck structure adopts the innovative form of module staggered joints and reliable pile system. The scheme design, manufacturing, offshore installation and the application effects of the platform are introduced.