Cracking-prevention construction device and construction method of negative moment area of continuous composite beam bridge, and beam bridge

The invention discloses a cracking-prevention construction device and construction method of a negative moment area of a continuous composite beam bridge, and the beam bridge. The construction devicecomprises anti-pulling and non-shear-resistant connectors, anchoring parts, inhaul cables and a center-hole jack. The anti-pulling and non-shear-resistant connectors are used for being arranged on thetop of a negative moment area steel beam; when a negative moment area concrete roof is poured on the top of the negative moment area steel beam, the anchoring parts with the inhaul cables are arranged on two ends of the length direction of the negative moment area concrete roof; the center-hole jack is arranged between the anchoring parts arranged on two ends of the length direction of the negative moment area concrete roof; the other end of the inhaul cable connected with the anchoring part at one end of the two ends is connected with one end of the center-hole jack, and the other end of theinhaul cable connected wit