Novel mechanical disc brake device

The novel mechanical disc brake device comprises a device shell, a first guide rod and a ball nut, an installation cover plate penetrating into the device shell is installed at the top end of the device shell, a second guide rod is transversely installed in the installation cover plate, a spring is arranged on the outer side of the second guide rod in a sleeved mode, and the first guide rod is connected with the ball nut. A first moving block sleeves the outer side of the second guide rod at one end of the spring, a second moving block sleeves the end, away from the first moving block, of the outer side of the second guide rod, a second brake pad is mounted at the bottom end of the first moving block, a first clamping plate sleeves the outer side of the second brake pad, and a first brake pad is mounted at the bottom end of the second moving block; and a second clamping plate sleeves the outer side of the first brake pad. The second brake pad and the first brake pad are driven to be disassembled from the inte