[en] According to the formation geological setting of types of cementing material and texture feature of cryptoexplosion rock in mesozoic uranium-bearing volcanic area in west Zhejiang province, the cryptoexplosion can be classified into four groups and nine subgroups. Its formation mechanism is discussed. It is emphasized that the control of the explosion-split breccia and explosion-split rock of detrital type and hydrothermal type over uranium metallogenesis. The paper also points out the prospecting direction of uranium deposits of cryptoexplosion rock type