The invention belongs to the field of surface treatment and particularly relates to a
chromium-plated tooling. In the prior art, because a very poor depth capability in a
chromium-plating process, uniformity degree of the thickness of a plating layer is difficult to ensure, so that only is a thick
chromium can be plated, wherein the thickness is large than a required thickness by more than 50 [mu]m, and then the thick chromium is grinded until a use size in a mechanizing workshop. Another reason why a uniform thickness cannot be ensured is that an auxiliary
anode during chromium-plating is required. Because a solution in a chromium trough is very low in transparency, the added auxiliary
anode is very difficult to be ensured to be at a central position. Meanwhile, there is a
potential risk that the
anode contacts with the surface of a part, which causes
electricity discharge and even causes part scrapping. The conventional production method is long in period, is high in cost and has quality
potential risk. The chromium-plated tooling in the invention is convenient to use and is stable and reliable, and is suitable for producing
aviation products as a tooling for plating chromium on inner bores. The tooling allows several parts to be electro-plated at the same time, is free of a
grinding process after chromium-plating and can ensure inner
diameter size and roundness of the part after chromium-plating to satisfy requirements.