Bridge erecting machine suitable for small-radius bridge construction

The invention discloses a bridge erecting machine suitable for small-radius bridge construction. The bridge erecting machine suitable for small-radius bridge construction comprises a main beam, a middle supporting leg, a middle auxiliary supporting leg, a transverse moving wheel box and a middle supporting leg transverse moving motor. The main beam is connected with the middle supporting leg and the middle auxiliary supporting leg through the transverse moving wheel box, and a bearing beam and a bent beam of the supporting leg are connected through a positioning pin. The supporting leg transverse moving motor drives the middle supporting leg to move and drives the main beam to deflect with the middle auxiliary supporting leg as the fulcrum and the middle supporting leg transverse moving wheel box as the rotating radius. According to the bridge erecting machine, the technical problem that a conventional bridge erecting machine cannot achieve small-radius beam plate erecting due to the fact that the direction o