The invention discloses an inverse V-shaped blocking dam. The body of the inverse V-shaped blocking dam is inverse V-shaped; the top of the inverse V-shaped blocking dam faces upper reaches; the dam body is built by using block stone net cages and has water permeability; the body of the block stone net cage is formed by enclosure of net cage sheets; and the interior of the cage body is loaded with loose stones. The inverse V-shaped blocking dam has the beneficial effects that a variable number of inverse V-shaped blocking dams formed by the water permeable block stone net cages are arranged to carry out diversion, energy dissipation and interception on flood, landslide and debris flow so as to reduce or eliminate the damage of flood, landslide and debris flow, to retain solid matters (gravels and sediment) and to fix silt in the dams.