The block brake is composed of two brake arms and two brake tiles on both sides of the brake wheel. It is based on the friction torque produced by the brake shoe to press the brake wheel.

　　According to the length of the sluice lever system of the block brake and the length of the sluice, it is divided into long journey block brakes and short stroke block brakes. Short stroke brake looser can be installed directly on the brake arm to make the brake arm compact, but because of the small brake force, it is only suitable for small brakes (the diameter of the brake is not more than 300mm). The lever system of sluice brake of long stroke brake can produce great loosening force and is suitable for large brakes.

　　The brake of block brake is divided into electromagnetic sluice, hydraulic electromagnetic brake and electric hydraulic push rod brake according to its working principle.

　　The essence of electromagnetic sluice is electromagnet, which can be divided into DC electromagnet and AC electromagnet according to the types of excitation current. The main disadvantages of electromagnetic sluice are violent action, impact, noise and easy damage.

　　The advantages of the electric hydraulic push rod sluice are: smooth action, no noise, allowing more times to start, and constant thrust thrust, but the upper gate is slow.