The essay mainly discusses a kind of design and reality of the system monitoring safety working of the dish-brake of the coal winch.

Combining the winch improvement of Hegang group Nanshan coal mine with the second team of PingMei group, the safety transformation of winch and the considerations of daily maintenance are given.

This paper introduces the work principle of four-quadrant operating high-pressure frequency converter, and its application in coal mine auxiliary shaft winch innovation system.