The utility model discloses a filtering and receiving cylinder for an FPSO (Floating Production Storage Offloading) hydrogen sulfide measuring instrument, which consists of a filter head, a gas-liquid separation sleeve and an oil tank joint; the filter head mainly consists of a joint and a filter cylinder, one end of the filter cylinder is connected with the joint, and the other end of the filter cylinder is connected with one end of the gas-liquid separation sleeve, and the oil tank joint is connected with the other end of the gas-liquid separation sleeve; the joint is connected with a gas inlet pipe of the hydrogen sulfide measuring instrument, and the oil tank joint is hermetically connected with an oil measuring hole of an oil tank. The gas-liquid separation sleeve consists of a cylinder body, three gas-liquid separation plates and a circular gas-liquid separation plate, wherein the three gas-liquid separation plates are staggered and distributed at intervals in the cylinder body along the axis direction; the circular gas-liquid separation plate is arranged in the cylinder body. The filtering and receiving cylinder has the benefit that due to the adoption of the above structure, a protective mask and a rag have no need to be used, and only the oil measuring hole needs to be aligned, so that the operating time is greatly saved, the operating cost can also be saved, the safety of operating personnel is improved, and the service life of the measuring instrument is prolonged.