NOVELTY - Continuous biochemical conversion of biomass for producing biogas, comprises (i) preparing and heating the biomass into a charging lock (3), (ii) supplying the biomass into a tubular reactor, (iii) adjusting the water content of the solid biomass at optimal level from the mouth of the reactor, (iv) mixing, heating, loosening and enlarging solidity factor of the reactor with the fermentation material, (v) self infecting the fermentation material in the areas of fermentation phases with anaerobic bacteria, and (vi) treating with explicit treatment components of the fermentation phases.    USE - The method is useful for continuous biochemical conversion of biomass for producing biogas.    ADVANTAGE - The system: is operated in a simple manner and cost efficient; is free of harmful environmental emissions; and is hygienic.    DETAILED DESCRIPTION - Continuous biochemical conversion of biomass for producing biogas with large optimization of the conversion method into narrow boundaries provided by the surrounding using a rotating tubular reactor, comprises (i) preparing and heating the biomass into a charging lock (3), (ii) supplying the biomass into the tubular reactor by a hydraulic closure of the charging lock, (iii) adjusting the water content of the solid biomass at optimal level from the mouth of the tubular reactor, (iv) mixing, heating, loosening and enlarging a solidity factor of the tubular reactor with the fermentation material by means a retainer grid (22), (v) self infecting the fermentation material in the areas of each fermentation phases with strongly developed anaerobic bacteria, and (vi) separately treating with explicit treatment components of the individual fermentation phases by hydrolysis, acid formation, acetic acid formation and methane formation. An INDEPENDENT CLAIM is also included for a plant for continuously carrying out biochemical conversion processes of biomass, comprising the charging lock, a shaft, an evacuation sheath (4), a device, preferably a processing plant (6), a connection point (7), the retainer grid and a spiral slide for the intensive support of the conversion processes, where (a) the tubular reactor is slightly inclined, placed and driven based on its length with many traction means bearing with respect to a horizontal plane, (b) the charging lock is provided with the hydraulic closure for the tubular reactor with the biomass, (c) the shafts of the tubular reactor is made of a packet of shaft modules, (d) the shaft modules are separately controlled after the heat emission, (e) a treatment system is provided into the tubular reactor for the preparation of an acidification agent, (f) the retainer grids are designed in the form of an axial cylindrical retainer made of retainer grid bar and heating tubes, (g) the tubular reactor are provided with many connection points for the treatment of the fermentation material of the respective fermentation phases, (h) the tubular reactor for self-infection of the fermentation material is provided with spiral slides in its interior, and (i) a discharge conveyor of the evacuation sheath is sealed with the fermentation residue.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic representation of the biogas plant (Drawing includes non-English language text).    Charging lock (3)    Evacuation sheath (4)    Processing plant (6)    Connection point (7)    Retainer grids (22)