The invention relates to the technical field of a device for measuring metering accuracy of an intelligent meter in a salt spray test box, in particular to a special measuring device for an intelligent box in a salt spray test box. Elastic vertical terminal posts in the device can be especially used for simulating the wiring method of on-site test. The device comprises an intelligent meter packaging box body, hook hanging brackets, meter hanging screws and the terminal posts, wherein the box body is provided with the hook hanging brackets, the inside of the box body is provided with the meter hanging screws, the bottom of the inside of the box body is provided with a base, and the base is connected with the elastic vertical terminal posts. The device can simulate the on-site actual wiring method and the meter terminal hole plugging method to carry out the salt spray test of the intelligent meter, and the operation is simple and convenient. The wiring terminal hole of the intelligent meter does not need to be plugged, and the test results of the on-site test actually affected by the salt spray corrosion and the metering accuracy can be repeated. Because the specifications of the intelligent meters are basically the same, three sets of intelligent meters in different models can be manufactured according to the models of the intelligent meters, then the salt spray tests of all intelligent meters can be realized, the practicality is high, and the operation is simple.