The invention relates to a recreational seat connecting frame. The recreational seat connecting frame comprises a rectangular cover, wherein an upper rack and a lower rack are arranged in the middle of the rectangular cover, an upper limiting frame pressing the upper side of the upper rack is arranged on the upper portion of the rectangular cover, and a lower limiting frame pressing the upper side of the lower rack is arranged on the lower portion of the rectangular cover; the tooth part of the upper rack is meshed with the tooth part of the lower rack, and structures used for hinging are fixed to the outer end of the upper rack and the outer end of the lower rack respectively. The recreational seat connecting frame can be assembled flexibly, a fun vehicle can be assembled flexibly by a user according to the number of tourists and the viewing mode, and fun experience of tourists is guaranteed; the fun vehicle can be connected in a front-back mode or left-right mode to meet different requirements in different situations. By disassembling fun vehicles behind which are not used in time, space can be saved, and energy can be saved.