NOVELTY - Marine bacterial biomass sulfuric acid corrosion analog device comprises a hydrogen sulfide preparation device and a bacterial corrosion device. The hydrogen sulfide preparation device is connected with the bacterial corrosion device through gas guide tube. The hydrogen sulfide preparation device comprises sodium sulfide bottle filled with sodium sulfide solution, hydrochloric acid bottle filled with hydrochloric acid solution and hydrogen sulfide reaction flask with clean water.    USE - Used as marine bacterial biomass sulfuric acid corrosion analog device.    ADVANTAGE - The device provides optimal environment for growth of marine bacteria.    DETAILED DESCRIPTION - Marine bacterial biomass sulfuric acid corrosion analog device comprises a hydrogen sulfide preparation device and a bacterial corrosion device. The hydrogen sulfide preparation device is connected with the bacterial corrosion device through gas guide tube. The hydrogen sulfide preparation device comprises sodium sulfide bottle filled with sodium sulfide solution, hydrochloric acid bottle filled with hydrochloric acid solution and hydrogen sulfide reaction flask with clean water. The lower liquid outlet of the sodium sulfide bottle and the hydrochloric acid bottle is extended into water liquid level of liquid outlet tube of the hydrogen sulfide reaction flask. The upper part of the hydrogen sulfide reaction flask is connected with an oxygen pump. The bacterial corrosion device is connected with the upper part of the hydrogen sulfide reaction flask through gas guide tube. The bacterial corrosion device comprises bacterial culture pool filled with sulfur-oxidizing bacteria. The hydrogen sulfide preparation device is connected with the upper part of the bacterial culture pool through gas guide tube. The gas guide tube is extended into the lower liquid surface of the bacterial culture pool. An INDEPENDENT CLAIM is also included for sulfuric acid corrosion of marine bacterial biomass, comprising (i) placing the sodium sulfide bottle and hydrochloric acid bottle at high level and hydrogen sulfide reaction flask at low level, adding specific amount of clean water into hydrogen sulfide reaction flask, coupling the sodium sulfide bottle, the hydrochloric acid bottle, the hydrogen sulfide reaction flask and the oxygen pump, extending catheter into lower liquid level of the hydrogen sulfide reaction flask, adding specific amount of sodium sulfide solution and hydrochloric acid solution into sodium sulfide bottle and hydrochloric acid bottle, coupling liquid inlet pipe with flow rate control valve and adjusting flow speed to zero, (ii) taking standard 9K culture medium as nutrient medium, activating sulfur-oxidizing bacteria, culturing to obtain activated bacteria, inoculating 10% inoculum size of the activated bacteria into 9K culture medium, placing sulfur-oxidizing bacterial liquid and concrete test block into bacterial culture pool, coupling the hydrogen sulfide reaction flask and the bacterial culture pool using the gas guide tube, inserting gas guide tube into bottom of the sulfur-oxidizing bacterial liquid, coupling bacterial culture pool and hydrogen sulfide absorption bottle filled with zinc acetate solution using hydrogen sulfide discharging pipe, where the hydrogen sulfide discharging pipe is extended into lower liquid surface of the zinc acetate solution, (iii) opening oxygen pump, regulating oxygen quantity, observing operation state of the device and ensuring that there is no gas leakage, opening the flow rate control valve of the liquid inlet pipe, controlling flow rate, injecting specific concentration of sodium sulfide solution and hydrochloric acid solution into sodium sulfide bottle and hydrochloric acid bottle, and starting the complete system, and (iv) monitoring growing period of bacteria, regularly replacing bacterial liquid, identifying growing characteristics of specific bacteria and replacing cycle for 2 weeks.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic representation of the marine bacterial biomass sulfuric acid corrosion analog device.