The invention relates to the water treatment field and in particular aims to solve the problem of how to realize the functional diversity and structural module of the manual injection type filter vat of various polar or non-polar filter materials for coagulation and flocculation. The combined type filter vat component comprises a filter vat cover (A), a preprocessor (B), a flow direction control tube (C), a main processor (D1), a support (E) and a purifying pipeline (F) which consists of universal pipe fittings according to the demand; the component of the invention can be conveniently assembled to a rural household water purification device capable of removing fluorine and arsenic according to demands and can also be assembled to a disinfection and coagulation-flocculation device when natural disasters are suddenly happened. The component is convenient to use, has low production cost and long life and can be directly assembled in site, thus playing an important role in the drinking water security of rural areas and disaster areas.