The invention provides a multipoint type detection apparatus for ash content of coal. The apparatus comprises a container, a detector, an electric control machine. The container comprises coal sample cabins, baffle plates and an automatic cinder valve (1). The detector comprises a gamma ray source device, a ray detector, a silicon drift detector (8) and a multichannel data analysis spectrometer (9). The electric control machine comprises a master control system (23), a power source (24) controlled by the master control system (23), a coal flow control system (25), a signal transmission system (26), a data processing and spectrum unfolding system (27) and a display system (27). By using the apparatus, multipoint continuous measurement of the ash content is realized. By pulling the baffle plates, the coal ash content is controlled to be measured in batches, and the coal samples measured by dual-energy gamma-ray are ensured to be in the same batch. Furthermore, the mutual interference between moderate-energy gamma-ray and low-energy gamma-ray is prevented, thus improving the representativeness and accuracy of the measurement.