A microchannel plate (MCP) gated X-ray framing camera with three channels is developed, in which the width of the MCP microstrip line cathode is 8 mm and the gap between two neighboring photocathodes is 2.8 mm. The photocathode is driven by the gating pulse with the width of 210 ps and the amplitude of -1.9 kV. The trigger jitter of this camera is measured by the fiber bunch method. The experimental results show that the measured trigger jitter is about 94 ps, which is basically consistent with 90 ps by a high-speed oscilloscope. In addition, the measured temporal resolution of this camera is about 100 ps.