Flow distributor of nuclear reactor lower chamber

The invention relates to a flow distributor of a nuclear reactor lower chamber, the flow distributor is arranged in a lower chamber in a lower end socket of a pressure vessel, and comprises a flow distribution plate, a connecting plate and a basic connecting plate, a reactor core lower support plate, the flow distribution plate, the connecting plate and the basic connecting plate are in the same axial line, and are orderly arranged from top to bottom; the flow distributor simplifies the reactor lower chamber structure, improves the stability and reliability, realizes coolant flow distribution of the reactor lower chamber, and overcomes an inhomogeneous flow field in a reactor core entrance region, and the flow distributor is simple in structure, reduces the cost, and improves the economical efficiency.