A direct current breaker based on vacuum magnetic blowout transfer, comprising: a first connection terminal, configured as an inlet wire of the direct current breaker; a second connection terminal, configured as an outlet wire of the direct current breaker; a main current branch, connected between the first connection terminal and the second connection terminal, wherein during current conduction of the direct current breaker, current flows through the main current branch; a transfer branch, connected between the first connection terminal and the second connection terminal and connected in parallel with the main current branch; an energy dissipation branch, connected between the first connection terminal and the second connection terminal and connected in parallel with the main current branch and the transfer branch; and a blowout unit, arranged between the main current branch and the transfer branch, wherein the blowout unit comprises a blowout circuit and a blowout coil; during current breaking of the direct current breaker, the blowout circuit excites the blowout coil to generate magnetic blowout, so that an arc voltage in the main current branch is raised, and the current is transferred from the main current branch to the transfer branch based on the arc voltage; wherein the transfer branch consists of a first branch, a second branch connected in parallel with the first branch, and a third branch connected with the first branch and the second branch; the first branch consists of a first diode and a second diode; the second branch consists of a third diode and a fourth diode; the positive pole of the first diode is connected in series with the positive pole of the second diode; the negative pole of the third diode is connected in series with the negative pole of the fourth diode; the positive pole of the third diode is connected with the negative pole of the first diode; the positive pole of the fourth diode is connected with the negative pole of the second diode; characterised in that the third branch consists of a capacitor and an inductor; one end of the capacitor is connected between the positive pole of the first diode and the positive pole of the second diode, and the other end of the capacitor is connected in series with the inductor; and the other end of the inductor is connected between the negative pole of the third diode and the negative pole of the fourth diode. a first connection terminal, configured as an inlet wire of the direct current breaker; a second connection terminal, configured as an outlet wire of the direct current breaker; a main current branch, connected between the first connection terminal and the second connection terminal, wherein during current conduction of the direct current breaker, current flows through the main current branch; a transfer branch, connected between the first connection terminal and the second connection terminal and connected in parallel with the main current branch; an energy dissipation branch, connected between the first connection terminal and the second connection terminal and connected in parallel with the main current branch and the transfer branch; and a blowout unit, arranged between the main current branch and the transfer branch, wherein the blowout unit comprises a blowout circuit and a blowout coil; during current breaking of the direct current breaker, the blowout circuit excites the blowout coil to generate magnetic blowout, so that an arc voltage in the main current branch is raised, and the current is transferred from the main current branch to the transfer branch based on the arc voltage; wherein the transfer branch consists of a first branch, a second branch connected in parallel with the first branch, and a third branch connected with the first branch and the second branch; the first branch consists of a first diode and a second diode; the second branch consists of a third diode and a fourth diode; the positive pole of the first diode is connected in series with the positive pole of the second diode; the negative pole of the third diode is connected in series with the negative pole of the fourth diode; the positive pole of the third diode is connected with the negative pole of the first diode; the positive pole of the fourth diode is connected with the negative pole of the second diode; characterised in that the third branch consists of a capacitor and an inductor; one end of the capacitor is connected between the positive pole of the first diode and the positive pole of the second diode, and the other end of the capacitor is connected in series with the inductor; and the other end of the inductor is connected between the negative pole of the third diode and the negative pole of the fourth diode.