Continuously variable transmission without power interruption

The invention discloses a continuously variable transmission without power interruption. The continuously variable transmission comprises a power input part, a main transmission part, a power output part, a braking part and a variable speed control part; the main transmission part comprises a case and a planetary gear train, the planetary gear train comprises a sun gear, a first-stage gear ring, a second-stage gear ring, a duplex planetary gear, a first-stage planet carrier, a second-stage planet carrier and a second-stage one-way clutch, the sun gear is in transmission connection with the power input part, the first-stage gear ring is braked through the braking part, engaging teeth are machined on the inner ring and the outer ring of the second-stage gear ring, one end of the duplex planetary gear is engaged with the first-stage gear ring and the sun gear, and the other end of the duplex planetary gear is engaged with the inner ring of the second-stage gear ring; and the second-stage planet carrier is in tra