The invention provides a miniature gasifier for tests. The existing conventional gasifier technologies are all own by large licensers, selected materials are expensive, and the whole cost is high. The miniature gasifier comprises a combustion chamber end socket (1), wherein a burner interface (11) is formed in the middle of the top of the combustion chamber end socket, the combustion chamber end socket is connected with a combustion chamber upper cylinder (2) through welding, the combustion chamber upper cylinder is connected with a combustion chamber lower cylinder (4) through an equipment flange (3), the combustion chamber lower cylinder is connected with a lower end socket (5) through welding, a flame retardant material support disc assembly (6) is arranged at the bottom of the combustion chamber lower cylinder, a flame retardant protective bushing (7) is welded at the center of the flame retardant material support disc assembly, a support ring (8) is arranged at the bottom of the flame retardant material support disc assembly, a rib plate (9) is arranged at the lower part of the support ring, a slag discharging basin (10) is arranged at the bottom of the combustion chamber lower cylinder, and the slag discharging basin is formed by a region enclosed by the lower end socket. The miniature gasifier is used for miniature gasifying experiments of waste gasifier processes.