An X-ray framing camera with wide microstrip line is described. It is designed for the flat field grating spectrograph. The microstrip line cathode deposited on the microchannel plate (MCP) with width of 20 mm is driven by four gating electrical pulses. The camera with modular design is made up of five basic components: the airbox, the MCP imager, the electric control system, the CCD camera system and the embedded computer. The camera is remote controlled by the embedded computer PC104. The camera is tested and the results show that the exposure time of the camera is 71 ps, the spatial resolution is 20 lp/mm, the gain uniformity of the microstrip line photocathode transverse to the pulse propagation direction is 1.51, and the gain uniformity along the pulse propagation direction is 5.11.