The invention provides a hydraulic feeding and fragmentation mine car of a stone sawing machine. The hydraulic feeding and fragmentation mine car is high in use safety performance and capable of greatly improving stone cutting work efficiency. The hydraulic feeding and fragmentation mine car comprises two transverse guide rails, a lower car body, an upper car body, four plate push oil cylinders, four coamings and four swing arms, the lower car body is arranged on the two transverse guide rails in a transverse sliding mode, the upper car body is arranged on a longitudinal guide rail of the lower car body in a longitudinal sliding mode, a front transmission support is arranged at one end of the lower car body, an oil cylinder is further arranged between the lower car body and the upper car body, a cylinder body of the oil cylinder is fixedly connected with a transmission support, a rear transmission support is arranged at the position, corresponding to the transmission support, of the end, away from the transmission support, of the upper car body, a piston rod of the oil cylinder is connected with the rear transmission support of the upper car body, the coamings can be opened and closed and are arranged on the side edge around the lower car body, the height of each coaming is larger than that of the upper car body, hinge seats are respectively arranged on the peripheral side of the lower car body, hinge buckles are arranged on the lower portions of the coamings respectively, and the hinge buckles and the corresponding hinge seats are rotatably hinged together through pin shafts respectively.