The utility model provides a natural gas compressing self-elevating platform of an ocean oil field. The natural gas compressing self-elevating platform comprises a main ship, pile legs, lifting devices, a natural gas compressing device, a connecting gallery bridge and a hoisting device. The main ship is of a square box structure. The pile legs vertically penetrate through the main ship, the fixing positions of the pile legs and the main ship can be adjusted in the height direction of the pile legs, and therefore the main ship can ascend and descend. The four pile legs are arranged on the bows and sterns of a left board and a right board of the main ship respectively and are distributed in a rectangular mode. The lifting devices are arranged on the main ship and correspond to the pile legs in a one-to-one mode, and then the lifting devices can be matched with the pile legs to achieve ascending and descending of the main ship. The natural gas compressing device is arranged in the middle of a main deck of the main ship and used for compressing associated natural gas in the ocean oil field. The connecting gallery bridge is arranged on the main ship. At least one hoisting device is installed on the main ship. The requirements for design construction and implementation of ocean oil gas producing and processing device are met through the organic combining of the components.