The invention relates to a desulfurizer and a desulphurising process, in particular to a desulfurizer and a desulphurising process for a mixed gas containing sulfides in diversified forms. The desulfurizer for the mixed gas containing the sulfides in diversified forms comprises a wet absorption tower and a drop catcher, wherein the wet absorption tower is connected with a rinsing water storage tank and a circulating pool; the bottom of the wet absorption tower is connected with a reaction regeneration pool, and the top of the wet absorption tower is connected with a dry absorption tower by virtue of a secondary drop catcher; the circulating pool is connected with a desulphurising solution storage tank, and the reaction regeneration pool is connected with a lime cream storage tank; the wet absorption tower is of a hollow-tower spraying structure; the secondary drop catcher is internally provided with a stainless steel wire ball. Compared with the prior art, the desulfurizer has the following advantages that the accident occurrence rate is low, and the tower body resistance is small; the secondary drop catcher is internally provided with the stainless steel wire ball, so that the service life of follow-up equipment can be prolonged.