Аннотация:Solar cyclic activity is connected with a dynamo wave of magnetic field propagating somewhere inside the solar convective zone The dynamo wave is supported by joint action of differential rotation and so-called alpha-effect which is determined by the level of mirror asymmetry o turbulence For decades astronomers and astrophysisists had no direct observational information concerning alpha-effect At the same time alpha-effect remains inassessible for direct laboratory experiments Observations of current helicity in solar active regions open at first time a unique possibility for direct observation of alpha effect The point is that the current helicity is associated with so-called magnetic helicity which directly participates in determination of the alpha effect Moreover the magnetic helicity hardly can be transported by spectral fluxes because the capasity of Kolmogorovian type spectrum is very limited in respect of magnetic helicity Being an inviscid integral of motion magnetic helicity accumulates inlarge scales and give severe constrains for solar dynamo action In the talk presented we compare the available current helicity observations obtained at Huairou solar station with predictions o solar dynamo models conserning helicity dynamics