The invention discloses an offshore foundation reconnaissance and detection integrated platform, and relates to the field of ocean engineering foundation reconnaissance. A cylindrical base stretches out of the sea surface through a transition section; the upper end of the cylindrical base is connected with a water platform; in-situ cross plate testing equipment, static cone penetration test equipment, full-flow penetration test equipment and drilling, sampling and reconnaissance operation equipment are mounted at the upper part of the water platform; a cylindrical partition is arranged inside the cylindrical base to form a reserved void compartment without a top plate; the top of the reserved void compartment without the top plate opens to the water platform; the number of negative pressure jet pumps and the number of negative pressure detection test modules are the same as the number of branch bins of the cylindrical base; four negative pressure jet pumps and four negative pressure detection test modules are arranged on the periphery of the top of the cylindrical base; inner air bags are arranged in the branch bins of the cylindrical base, and are used for adjusting and centralizing in the sinking process. The integrated offshore foundation reconnaissance and detection platform has the benefits that the platform and an offshore wind flashlight type basic mounting ship are coordinated to be used, no extra tug boat or other mounting equipment is needed, and the operation time and cost are greatly reduced.