Abstract: The dissolvable bridge plug is designed for temporarily plugging an oil and gas wellbore, and includes a mandrel, a rubber tube, a conical sleeve, a slip, and a lower sub, wherein, the mandrel, rubber tube, conical sleeve, slip, and lower sub are made of a dissolvable material. The inner surface of one end of the lower sub is arranged with an anti-preset mechanism that contacts with the other end of the mandrel. As the temperature in the wellbore is recovered and meets the condition under which the components in the bridge plug can be dissolved after the setting and fracturing operation is completed. The dissolvable bridge plug contacts with the fluids in the oil and gas well and has a dissolution reaction with the fluids, and finally is dissolved into fine particles completely.