The tram with suspended carbody adopts modular articulated carbody structure, and each module of the carbody is connected by articulated equipment, so its kinematic envelope calculation cannot directly use the calculation method of subway vehicle with rigid carbody. According to the structure and degree of freedom of movement of the tram with 5 module suspended body, the calculation method of the kinematic envelope of the tram with 5 module suspended body was discussed with reference to the CJJ 96—2003 standard. Based on the relationship between carboy modules and the movement between carbody and bogie, the values of the transverse deflection coefficient, the vertical deflection coefficient and the flexible coefficient of each modular were analyzed and transverse displacement caused by the relative rotation between carboy and bogie was taken into account additionally. The proposed method could be extended to 3 module and 7 module suspended carbody trams and single carbody trams.