The invention provides a dissolving apparatus for the chemical industry. The dissolving apparatus comprises a case body and a case cover, wherein the upper part of the case body is provided with a feed inlet, and the lower part of the case body is provided with a discharge outlet; and the feed inlet and the discharge outlet are respectively provided with a valve; a screen drum and a stirring device are arranged in the case body; the peripheral bottom surface and the wall of the screen drum are provided with sieve pores; the stirring device is arranged below the screen drum and is composed of astirring shaft and stirring blades mounted on the upper end of the stirring shaft; the other end of the stirring shaft is connected with a power shaft of a motor; the case body and the case cover areconnected via screws; a sealing rubber gasket is arranged between the case body and the case cover; the inner walls of the case body and the case cover are both provided with anticorrosive coatings;a temperature sensor and a filter screen are arranged at the discharge outlet in the case body; and the motor is connected with a frequency converter. The dissolving apparatus has the beneficial effects of simple structure, convenience in usage, capacity of more effectively controlling dissolving process, fast dissolving speed and good dissolving effect.