The invention provides a multi-pipe rapid pressure testing device. The device comprises a water sending assembly, a branch pipe, a collection pipe and a rapid joint. A first water inlet and multiple first water outlets are arranged in the branch pipe. The first water inlet is connected with the water sending assembly. Multiple second water inlets and a second water outlet are arranged in the collection pipe. The second water inlets correspond to the first water outlets. Two end of a pressure testing pipe are detachably connected to a first water outlet and a second water inlet correspondinglythrough the rapid joint. According to the invention, production bottlenecks in the prior art can be well eliminated; labor intensity of workers is greatly reduced; manufacturing periods for manufacturing heat exchangers are shortened; manufacturing cost is reduced; time and labor are saved; there is no need to cut the pressure testing pipe; and production efficiency is high.