The invention provides a stroke indication device of a non-rising stem gate valve, and relates to the field of water supply and drainage valves. The stroke indication device of the non-rising stem gate valve comprises an original valve body which is provided with a valve sleeve, a sliding hole is formed in the side face of the valve sleeve, a scale plate is arranged beside the sliding hole, an inner threaded sleeve is arranged on a valve rod in the valve sleeve, a sliding groove is arranged outside the inner threaded sleeve, and an indicator is arranged in the sliding groove and points to the sliding hole. On the basis that the structure and components of an original valve is not changed, a part of stroke is added on the valve rod of an original valve according to the picture, the part of stroke can be mounted on the original valve through the indicator, a scale tube and two fastening screws, the simple mechanism can be used for meeting requirements on stroke indication, the transformation is fast, volume production can be realized, energy consumption is lowered, raw materials and processes are eliminated to the largest extent, machining is simple, operation is simple and convenient, and labor intensity is lowered.