The utility model provides a cylinder formula spud leg class platform triangle radiation rack and pinion formula elevating gear, it includes three gear systems of group, three group's rack and lift frame, the rack welding is on cylinder formula spud leg, the gear system is that the triangle is radial to be arranged on the cylinder formula spud leg, the all mistakes of gear train lift frame is connected with the rack that corresponds, makes the gear system when the lift of cylinder formula spud leg class platform, work or towing, can with correspond rack toothing. Reduce elevating gear's height, guaranteed the homogeneity as far as possible of gear load. When the gear bearing capacity must increase, can not roll up the gear because of the increase of gear number and arrange the number to the inequality nature of gear bearing capacity has been improved.