QTJ4-25C Block Machine is a new model developed by our company. For this machine, all the advantages of medium and small sized block machines of similar types have be absorbed. It is cheap in price, easy in operating, and durable in use. This machine is automatic in material feeding, martial distributing, material scraping and carriage plate placing. This machine is equipped with a power-driven decoupling device and a specialized stacker, which can stack 3—5 layers of the blocks. For this machine, there is the specialized carriage cart for block discharging, with which the automatic production with small sized block machine, under the conditions to reduce the labor intensity of workers, can be achieved, and the output of the blocks can be increased substantially. So, it is an ideal alternative of the similar machines. This machine is suitable for the small and medium sized block factories for mass production.