The utility model discloses a high-voltage vacuum circuit breaker cabinet pure mechanical interlocking mechanism which comprises a cabinet body, a first door lock, a second door lock and a high-voltage vacuum circuit breaker. The first door lock is installed on the back door of the cabinet body. The high-voltage vacuum circuit breaker is installed in the cabinet body. The high-voltage vacuum circuit breaker comprises an operating mechanism, two insulator pull rods, a supporting rod and a vacuum arc extinguish chamber. An opening button, an opening mechanism and an opening coil are arranged in the operating mechanism. The opening mechanism is in contacted with the opening button and the opening coil separately through rotation. The second door lock is connected with the high-voltage vacuum circuit breaker. Through the above method, The high-voltage vacuum circuit breaker cabinet pure mechanical interlocking mechanism of the utility model adopts the pure mechanical method to make the lock on the vacuum circuit breaker and the lock on the back lower door share a key for linkage, advantages of easy operation, simple and reasonable structure, strict five-prevention performance, low production cost and no electricity can be realized, and the consumption of energy sources and materials can be reduced.