The utility model discloses a road bridge expansion joint connecting device, including the anchor muscle, anchor muscle end -to -end connection has well roof beam, and the inside locating hole that isprovided with of well roof beam, the locating hole inside wall is provided with the bolt, and is connected with the stopper on the left of the last bolt, stopper below is provided with flexible groove, and flexible tank bottom portion lateral wall installs down the bolt, well roof beam front end lateral wall is fixed with the connecting block, and the connecting block lateral wall is connected with the spread groove, locating hole and last bolt be about stopper bilateral symmetry installation, and the connected mode between locating hole and the last bolt is threaded connection, go up the bolt and install about the horizontal symmetry axis longitudinal symmetry in groove that stretches out and draws back with lower bolt, and go up bolt and lower bolt difference through connection piece and spread groove. This road bridge expansion joint connecting device adopts concatenation connection structure, realizes the concatenation of expansion joint connecting device combination formula through connecting block and spread groove, has improved expansion joint connecting device's applicable position, the device transportation of being convenient for simultaneously.