The invention provides an intensive bridge type multi-port hybrid direct current circuit breaker and a control method. The circuit breaker comprises a first direct current bus, a second direct currentbus, a main current disconnection branch circuit, n upper current connection branch circuits, n lower current connection branch circuits and n ports, wherein n is an integer not less than 2; each upper current connection branch circuit and each lower current connection branch circuit are connected in series to serve as a group of series branch circuits; each port corresponds to one group of series branch circuits and is connected to a common connection point of the corresponding upper and lower current connection branch circuits; the main current disconnection branch circuit is connected in parallel with each group of series branch circuits; the two ends of the main current disconnection branch circuit are provided with the first direct-current bus and the second direct-current bus respectively; the main current disconnection branch circuit comprises a plurality of current disconnection units connected in series; each current disconnection unit is connected in parallel with a lightning arrester by a main current disconnection switch; each upper current connection branch circuit is connected in series with a diode by a first auxiliary switch; and each lower current connection branch circuit is connected in series with a second auxiliary switch by a fast mechanical switch, and then is connected in parallel with the diode. The natural current conversion characteristics of the diodes are utilized, so that the cost is greatly reduced.