The invention relates to power grid parts, in particular to a fast switching distributing frame. A transfer switch is arranged, and a signal terminal is connected to equipment ports through the transfer switch; after main equipment is damaged during usage, an operator can operate the transfer switch to allow the signal terminal to connect with auxiliary equipment conveniently, and the operation is facilitated; comparing with the prior art that the main equipment and the auxiliary equipment are switched by plugging and pulling a crystal head is avoided, operation is simple, crystal head plugging and pulling are omitted, and the service lives of the crystal head, signal terminal and equipment ports are prolonged.